/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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:35:42,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:35:42,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:35:42,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:35:42,159 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 [2021-07-09 17:35:42,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:35:42,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:35:42,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:35:42,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:35:42,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:35:42,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:35:42,198 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:35:42,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:35:42,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:35:42,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:35:42,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:35:42,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:35:42,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:35:42,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:35:42,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:35:42,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:35:42,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:35:42,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:35:42,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:35:42,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:35:42,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:35:42,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:35:42,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:35:42,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:35:42,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:35:42,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:35:42,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:35:42,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:35:42,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:35:42,203 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:35:42,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:35:42,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:35:42,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:35:42,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:35:42,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:35:42,570 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:35:42,573 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:35:42,574 INFO L432 ainManager$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 [2021-07-09 17:35:42,574 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2021-07-09 17:35:42,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:35:42,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:35:42,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:35:42,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:35:42,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:35:42,627 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,633 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:35:42,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:35:42,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:35:42,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:35:42,650 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,650 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,660 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,660 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,669 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,671 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,671 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 09.07 05:35:42" (1/1) ... [2021-07-09 17:35:42,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:35:42,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:35:42,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:35:42,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:35:42,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:35:42" (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 [2021-07-09 17:35:42,765 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:35:42,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:35:42,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:35:42,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:35:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:35:42,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:35:42,766 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:35:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:35:42,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:35:42,767 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:35:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:35:42,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:35:42,769 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:35:43,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:35:43,168 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-09 17:35:43,169 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:35:43 BoogieIcfgContainer [2021-07-09 17:35:43,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:35:43,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:35:43,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:35:43,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:35:43,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:35:42" (1/2) ... [2021-07-09 17:35:43,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f3e389 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:35:43, skipping insertion in model container [2021-07-09 17:35:43,174 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 09.07 05:35:43" (2/2) ... [2021-07-09 17:35:43,176 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-07-09 17:35:43,180 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:35:43,180 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:35:43,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:35:43,181 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:35:43,230 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:35:43,253 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:35:43,269 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:35:43,269 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:35:43,269 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:35:43,270 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:35:43,270 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:35:43,270 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:35:43,270 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:35:43,270 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:35:43,278 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-07-09 17:35:43,298 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) [2021-07-09 17:35:43,300 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) [2021-07-09 17:35:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:35:43,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:43,308 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:43,309 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-07-09 17:35:43,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:43,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030252602] [2021-07-09 17:35:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:43,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030252602] [2021-07-09 17:35:43,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030252602] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:35:43,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:35:43,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:35:43,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967720921] [2021-07-09 17:35:43,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:35:43,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:35:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:35:43,534 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) [2021-07-09 17:35:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:43,597 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-07-09 17:35:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:35:43,599 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 [2021-07-09 17:35:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:43,613 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:35:43,614 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:35:43,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:35:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:35:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-07-09 17:35:43,673 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) [2021-07-09 17:35:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-07-09 17:35:43,678 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-07-09 17:35:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:43,679 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-07-09 17:35:43,679 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) [2021-07-09 17:35:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-07-09 17:35:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:43,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:43,682 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:43,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:35:43,683 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1970777821, now seen corresponding path program 1 times [2021-07-09 17:35:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:43,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567526626] [2021-07-09 17:35:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:43,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567526626] [2021-07-09 17:35:43,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567526626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248686269] [2021-07-09 17:35:43,866 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 [2021-07-09 17:35:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:35:43,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248686269] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:35:44,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:35:44,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-07-09 17:35:44,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316472486] [2021-07-09 17:35:44,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:35:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:35:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:35:44,151 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) [2021-07-09 17:35:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,323 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-07-09 17:35:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:35:44,324 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 [2021-07-09 17:35:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,328 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:35:44,328 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:35:44,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:35:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:35:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-07-09 17:35:44,349 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) [2021-07-09 17:35:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-07-09 17:35:44,350 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-07-09 17:35:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,351 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-07-09 17:35:44,351 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) [2021-07-09 17:35:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-07-09 17:35:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:44,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:44,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:35:44,554 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash -92460565, now seen corresponding path program 2 times [2021-07-09 17:35:44,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:44,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580203575] [2021-07-09 17:35:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:44,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580203575] [2021-07-09 17:35:44,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580203575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608553616] [2021-07-09 17:35:44,602 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 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 [2021-07-09 17:35:44,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-07-09 17:35:44,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:35:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:35:44,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608553616] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:35:44,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:35:44,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-07-09 17:35:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224808210] [2021-07-09 17:35:44,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:35:44,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:35:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:35:44,791 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) [2021-07-09 17:35:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,867 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-07-09 17:35:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:35:44,867 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 [2021-07-09 17:35:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,869 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:35:44,870 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:35:44,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:35:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:35:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-07-09 17:35:44,887 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) [2021-07-09 17:35:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-07-09 17:35:44,890 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-07-09 17:35:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,891 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-07-09 17:35:44,891 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) [2021-07-09 17:35:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-07-09 17:35:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:44,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,897 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:45,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:45,098 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:45,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1791011915, now seen corresponding path program 1 times [2021-07-09 17:35:45,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:45,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540751422] [2021-07-09 17:35:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540751422] [2021-07-09 17:35:45,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540751422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614087745] [2021-07-09 17:35:45,244 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 [2021-07-09 17:35:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:45,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:35:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:45,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:45,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,525 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 5 treesize of output 3 [2021-07-09 17:35:45,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:45,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,534 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 11 treesize of output 7 [2021-07-09 17:35:45,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:45,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:45,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-09 17:35:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614087745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:45,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:35:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103586286] [2021-07-09 17:35:45,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:35:45,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:35:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:35:45,765 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) [2021-07-09 17:35:46,670 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-07-09 17:35:47,196 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-09 17:35:47,324 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-07-09 17:35:47,564 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-09 17:35:47,802 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-09 17:35:48,072 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-07-09 17:35:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:48,114 INFO L93 Difference]: Finished difference Result 482 states and 1415 transitions. [2021-07-09 17:35:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:35:48,115 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 [2021-07-09 17:35:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:48,118 INFO L225 Difference]: With dead ends: 482 [2021-07-09 17:35:48,118 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:35:48,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2158.5ms TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:35:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:35:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 204. [2021-07-09 17:35:48,127 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) [2021-07-09 17:35:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2021-07-09 17:35:48,128 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2021-07-09 17:35:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:48,128 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2021-07-09 17:35:48,128 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) [2021-07-09 17:35:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2021-07-09 17:35:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:48,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:48,129 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:48,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,354 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-07-09 17:35:48,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:48,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505822720] [2021-07-09 17:35:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505822720] [2021-07-09 17:35:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505822720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288616153] [2021-07-09 17:35:48,452 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 [2021-07-09 17:35:48,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:48,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,672 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 13 treesize of output 9 [2021-07-09 17:35:48,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,681 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 [2021-07-09 17:35:48,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,686 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 5 treesize of output 3 [2021-07-09 17:35:48,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:48,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:48,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,726 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-07-09 17:35:48,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:48,727 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-07-09 17:35:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288616153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:35:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004715687] [2021-07-09 17:35:48,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:35:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:35:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:35:48,858 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) [2021-07-09 17:35:49,123 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-09 17:35:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:49,442 INFO L93 Difference]: Finished difference Result 366 states and 1056 transitions. [2021-07-09 17:35:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:49,449 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 [2021-07-09 17:35:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:49,453 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:35:49,453 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:35:49,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 489.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:35:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 219. [2021-07-09 17:35:49,465 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) [2021-07-09 17:35:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 657 transitions. [2021-07-09 17:35:49,466 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 657 transitions. Word has length 19 [2021-07-09 17:35:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:49,466 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 657 transitions. [2021-07-09 17:35:49,466 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) [2021-07-09 17:35:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 657 transitions. [2021-07-09 17:35:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:49,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:49,467 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:49,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,687 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-07-09 17:35:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:49,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977441042] [2021-07-09 17:35:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977441042] [2021-07-09 17:35:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977441042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741404445] [2021-07-09 17:35:49,814 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 [2021-07-09 17:35:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:50,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,058 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 11 treesize of output 7 [2021-07-09 17:35:50,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,065 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 19 treesize of output 13 [2021-07-09 17:35:50,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,080 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 19 treesize of output 13 [2021-07-09 17:35:50,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,105 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:50,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:50,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:50,216 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-07-09 17:35:50,217 INFO L628 ElimStorePlain]: treesize reduction 100, result has 51.7 percent of original size [2021-07-09 17:35:50,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:35:50,233 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:389, output treesize:107 [2021-07-09 17:35:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:50,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741404445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:50,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:35:50,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426350227] [2021-07-09 17:35:50,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:35:50,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:35:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:35:50,449 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) [2021-07-09 17:35:50,961 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-09 17:35:51,080 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-07-09 17:35:51,277 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 17:35:51,427 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-09 17:35:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:51,508 INFO L93 Difference]: Finished difference Result 477 states and 1330 transitions. [2021-07-09 17:35:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:51,508 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 [2021-07-09 17:35:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:51,511 INFO L225 Difference]: With dead ends: 477 [2021-07-09 17:35:51,511 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:35:51,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:35:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 224. [2021-07-09 17:35:51,520 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) [2021-07-09 17:35:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 682 transitions. [2021-07-09 17:35:51,521 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 682 transitions. Word has length 19 [2021-07-09 17:35:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:51,521 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 682 transitions. [2021-07-09 17:35:51,521 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) [2021-07-09 17:35:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 682 transitions. [2021-07-09 17:35:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:51,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:51,523 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:51,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:35:51,737 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-07-09 17:35:51,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:51,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762367887] [2021-07-09 17:35:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762367887] [2021-07-09 17:35:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762367887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433927040] [2021-07-09 17:35:51,902 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 [2021-07-09 17:35:51,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:52,101 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 18 treesize of output 12 [2021-07-09 17:35:52,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:52,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,111 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 12 treesize of output 8 [2021-07-09 17:35:52,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,120 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 19 treesize of output 13 [2021-07-09 17:35:52,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,125 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 19 treesize of output 13 [2021-07-09 17:35:52,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:52,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:52,136 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,139 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 11 treesize of output 7 [2021-07-09 17:35:52,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,209 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-07-09 17:35:52,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:52,210 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:257, output treesize:79 [2021-07-09 17:35:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433927040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:52,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:35:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031675043] [2021-07-09 17:35:52,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:35:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:35:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:35:52,384 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) [2021-07-09 17:35:52,840 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 17:35:52,983 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-09 17:35:53,200 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-09 17:35:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,321 INFO L93 Difference]: Finished difference Result 454 states and 1282 transitions. [2021-07-09 17:35:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:53,321 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 [2021-07-09 17:35:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,324 INFO L225 Difference]: With dead ends: 454 [2021-07-09 17:35:53,325 INFO L226 Difference]: Without dead ends: 421 [2021-07-09 17:35:53,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-09 17:35:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 229. [2021-07-09 17:35:53,333 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) [2021-07-09 17:35:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 702 transitions. [2021-07-09 17:35:53,334 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 702 transitions. Word has length 19 [2021-07-09 17:35:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,335 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 702 transitions. [2021-07-09 17:35:53,335 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) [2021-07-09 17:35:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 702 transitions. [2021-07-09 17:35:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:53,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,336 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:53,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:53,560 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-07-09 17:35:53,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:53,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863211503] [2021-07-09 17:35:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863211503] [2021-07-09 17:35:53,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863211503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027018419] [2021-07-09 17:35:53,672 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 [2021-07-09 17:35:53,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:35:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:53,886 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 5 treesize of output 3 [2021-07-09 17:35:53,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:53,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,893 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 13 treesize of output 9 [2021-07-09 17:35:53,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,897 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 12 treesize of output 8 [2021-07-09 17:35:53,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,901 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 11 treesize of output 7 [2021-07-09 17:35:53,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,927 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-07-09 17:35:53,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:53,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-07-09 17:35:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027018419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:54,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:35:54,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555063477] [2021-07-09 17:35:54,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:35:54,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:35:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:35:54,012 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) [2021-07-09 17:35:54,304 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-09 17:35:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:54,833 INFO L93 Difference]: Finished difference Result 471 states and 1333 transitions. [2021-07-09 17:35:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:54,833 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 [2021-07-09 17:35:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:54,837 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:35:54,837 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:35:54,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 742.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:35:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 249. [2021-07-09 17:35:54,847 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) [2021-07-09 17:35:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 767 transitions. [2021-07-09 17:35:54,848 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 767 transitions. Word has length 19 [2021-07-09 17:35:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 767 transitions. [2021-07-09 17:35:54,848 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) [2021-07-09 17:35:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 767 transitions. [2021-07-09 17:35:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:54,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:54,852 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:55,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,067 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:55,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-07-09 17:35:55,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:55,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940831945] [2021-07-09 17:35:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:55,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:55,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940831945] [2021-07-09 17:35:55,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940831945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911708045] [2021-07-09 17:35:55,164 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 [2021-07-09 17:35:55,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:35:55,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:35:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:55,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:55,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,374 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 13 treesize of output 9 [2021-07-09 17:35:55,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:55,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:55,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:55,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:55,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:55,425 INFO L628 ElimStorePlain]: treesize reduction 32, result has 54.3 percent of original size [2021-07-09 17:35:55,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:55,426 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-07-09 17:35:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:55,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911708045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:55,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:35:55,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164848867] [2021-07-09 17:35:55,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:35:55,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:35:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:35:55,532 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) [2021-07-09 17:35:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:56,066 INFO L93 Difference]: Finished difference Result 349 states and 1061 transitions. [2021-07-09 17:35:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:56,067 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 [2021-07-09 17:35:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:56,069 INFO L225 Difference]: With dead ends: 349 [2021-07-09 17:35:56,069 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:35:56,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:35:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2021-07-09 17:35:56,076 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) [2021-07-09 17:35:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 787 transitions. [2021-07-09 17:35:56,077 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 787 transitions. Word has length 19 [2021-07-09 17:35:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:56,077 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 787 transitions. [2021-07-09 17:35:56,077 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) [2021-07-09 17:35:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 787 transitions. [2021-07-09 17:35:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:56,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:56,079 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:56,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-09 17:35:56,303 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-07-09 17:35:56,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:56,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142101596] [2021-07-09 17:35:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:56,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142101596] [2021-07-09 17:35:56,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142101596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455173523] [2021-07-09 17:35:56,389 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 [2021-07-09 17:35:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:35:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:56,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,573 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 18 treesize of output 12 [2021-07-09 17:35:56,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:56,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,583 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 12 treesize of output 8 [2021-07-09 17:35:56,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,594 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 18 treesize of output 12 [2021-07-09 17:35:56,595 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:56,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,612 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 11 treesize of output 7 [2021-07-09 17:35:56,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,672 INFO L628 ElimStorePlain]: treesize reduction 48, result has 59.3 percent of original size [2021-07-09 17:35:56,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:56,674 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:409, output treesize:70 [2021-07-09 17:35:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455173523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:56,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:35:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951435664] [2021-07-09 17:35:56,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:35:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:35:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:35:56,890 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) [2021-07-09 17:35:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:57,957 INFO L93 Difference]: Finished difference Result 515 states and 1500 transitions. [2021-07-09 17:35:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:57,957 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 [2021-07-09 17:35:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:57,960 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:35:57,960 INFO L226 Difference]: Without dead ends: 427 [2021-07-09 17:35:57,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-09 17:35:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 269. [2021-07-09 17:35:57,969 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) [2021-07-09 17:35:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 857 transitions. [2021-07-09 17:35:57,971 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 857 transitions. Word has length 19 [2021-07-09 17:35:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:57,971 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 857 transitions. [2021-07-09 17:35:57,971 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) [2021-07-09 17:35:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 857 transitions. [2021-07-09 17:35:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:57,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:57,972 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:58,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:58,185 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-07-09 17:35:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:58,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720816089] [2021-07-09 17:35:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:58,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:58,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720816089] [2021-07-09 17:35:58,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720816089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073773307] [2021-07-09 17:35:58,300 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 [2021-07-09 17:35:58,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:35:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:58,482 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 19 treesize of output 13 [2021-07-09 17:35:58,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:58,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:58,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,495 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 18 treesize of output 12 [2021-07-09 17:35:58,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,499 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 12 treesize of output 8 [2021-07-09 17:35:58,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:58,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:58,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:58,512 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,515 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 [2021-07-09 17:35:58,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:58,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:58,525 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:35:58,529 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,607 INFO L628 ElimStorePlain]: treesize reduction 87, result has 47.9 percent of original size [2021-07-09 17:35:58,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:58,609 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:386, output treesize:80 [2021-07-09 17:35:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073773307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:58,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-07-09 17:35:58,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607309346] [2021-07-09 17:35:58,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:35:58,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:58,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:35:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:35:58,883 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) [2021-07-09 17:35:59,179 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-07-09 17:35:59,403 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-09 17:35:59,668 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 17:35:59,831 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-07-09 17:36:00,066 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-09 17:36:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,073 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2021-07-09 17:36:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:00,074 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 [2021-07-09 17:36:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,076 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:36:00,076 INFO L226 Difference]: Without dead ends: 452 [2021-07-09 17:36:00,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-09 17:36:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 274. [2021-07-09 17:36:00,086 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) [2021-07-09 17:36:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 877 transitions. [2021-07-09 17:36:00,087 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 877 transitions. Word has length 19 [2021-07-09 17:36:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,087 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 877 transitions. [2021-07-09 17:36:00,087 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) [2021-07-09 17:36:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 877 transitions. [2021-07-09 17:36:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:00,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,088 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:00,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,301 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash -709814267, now seen corresponding path program 9 times [2021-07-09 17:36:00,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:00,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826701600] [2021-07-09 17:36:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:00,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:00,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826701600] [2021-07-09 17:36:00,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826701600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199171741] [2021-07-09 17:36:00,419 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 [2021-07-09 17:36:00,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:36:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:00,648 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 5 treesize of output 3 [2021-07-09 17:36:00,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,653 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 19 treesize of output 13 [2021-07-09 17:36:00,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,658 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 18 treesize of output 12 [2021-07-09 17:36:00,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,663 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 19 treesize of output 13 [2021-07-09 17:36:00,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,668 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 [2021-07-09 17:36:00,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:00,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:00,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:00,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,685 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 19 treesize of output 13 [2021-07-09 17:36:00,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:00,692 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:00,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:00,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:00,704 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,763 INFO L628 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2021-07-09 17:36:00,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:00,764 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:382, output treesize:58 [2021-07-09 17:36:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199171741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-07-09 17:36:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567533472] [2021-07-09 17:36:00,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:00,924 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) [2021-07-09 17:36:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:01,693 INFO L93 Difference]: Finished difference Result 434 states and 1279 transitions. [2021-07-09 17:36:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:01,693 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 [2021-07-09 17:36:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:01,695 INFO L225 Difference]: With dead ends: 434 [2021-07-09 17:36:01,695 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:36:01,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:36:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2021-07-09 17:36:01,702 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) [2021-07-09 17:36:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 872 transitions. [2021-07-09 17:36:01,703 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 872 transitions. Word has length 19 [2021-07-09 17:36:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:01,703 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 872 transitions. [2021-07-09 17:36:01,704 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) [2021-07-09 17:36:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 872 transitions. [2021-07-09 17:36:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:01,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:01,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:01,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:01,921 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-07-09 17:36:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:01,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241599997] [2021-07-09 17:36:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:02,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:02,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241599997] [2021-07-09 17:36:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241599997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431109605] [2021-07-09 17:36:02,022 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 [2021-07-09 17:36:02,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:36:02,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:02,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,214 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 17 treesize of output 11 [2021-07-09 17:36:02,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,220 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 18 treesize of output 12 [2021-07-09 17:36:02,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,225 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 18 treesize of output 12 [2021-07-09 17:36:02,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,231 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 18 treesize of output 12 [2021-07-09 17:36:02,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:02,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:02,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:02,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:02,250 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:02,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,256 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 11 treesize of output 7 [2021-07-09 17:36:02,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:02,326 INFO L628 ElimStorePlain]: treesize reduction 100, result has 44.1 percent of original size [2021-07-09 17:36:02,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:02,327 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-07-09 17:36:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:02,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431109605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:02,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:36:02,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799782560] [2021-07-09 17:36:02,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:02,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:02,618 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) [2021-07-09 17:36:02,951 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 17:36:03,221 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 17:36:03,519 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-09 17:36:03,683 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-09 17:36:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:03,714 INFO L93 Difference]: Finished difference Result 634 states and 1845 transitions. [2021-07-09 17:36:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:03,715 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 [2021-07-09 17:36:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:03,717 INFO L225 Difference]: With dead ends: 634 [2021-07-09 17:36:03,717 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:36:03,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1147.1ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:36:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 284. [2021-07-09 17:36:03,727 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) [2021-07-09 17:36:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 912 transitions. [2021-07-09 17:36:03,728 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 912 transitions. Word has length 19 [2021-07-09 17:36:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:03,728 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 912 transitions. [2021-07-09 17:36:03,728 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) [2021-07-09 17:36:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 912 transitions. [2021-07-09 17:36:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:03,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:03,729 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:03,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,953 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-07-09 17:36:03,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:03,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706137034] [2021-07-09 17:36:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706137034] [2021-07-09 17:36:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706137034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426649767] [2021-07-09 17:36:04,047 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 [2021-07-09 17:36:04,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:04,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:04,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:36:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:04,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:04,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:04,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:04,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:04,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,318 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-09 17:36:04,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:04,319 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:133, output treesize:49 [2021-07-09 17:36:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426649767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:04,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:36:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556790373] [2021-07-09 17:36:04,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:04,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:04,410 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) [2021-07-09 17:36:04,808 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-09 17:36:05,035 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-09 17:36:05,249 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 17:36:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:05,311 INFO L93 Difference]: Finished difference Result 612 states and 1763 transitions. [2021-07-09 17:36:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:05,311 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 [2021-07-09 17:36:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:05,314 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:36:05,314 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:36:05,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 870.2ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:36:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 294. [2021-07-09 17:36:05,324 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) [2021-07-09 17:36:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 952 transitions. [2021-07-09 17:36:05,325 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 952 transitions. Word has length 19 [2021-07-09 17:36:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:05,325 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 952 transitions. [2021-07-09 17:36:05,325 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) [2021-07-09 17:36:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 952 transitions. [2021-07-09 17:36:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:05,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:05,326 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:05,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 17:36:05,541 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-07-09 17:36:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:05,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090999969] [2021-07-09 17:36:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090999969] [2021-07-09 17:36:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090999969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343744634] [2021-07-09 17:36:05,618 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 [2021-07-09 17:36:05,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:36:05,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:05,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:05,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:05,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:05,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:05,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:05,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:05,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:05,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,869 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-07-09 17:36:05,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:05,870 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-07-09 17:36:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343744634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:36:06,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244040419] [2021-07-09 17:36:06,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:06,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:06,024 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) [2021-07-09 17:36:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,137 INFO L93 Difference]: Finished difference Result 533 states and 1561 transitions. [2021-07-09 17:36:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:07,138 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 [2021-07-09 17:36:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,139 INFO L225 Difference]: With dead ends: 533 [2021-07-09 17:36:07,140 INFO L226 Difference]: Without dead ends: 405 [2021-07-09 17:36:07,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-09 17:36:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2021-07-09 17:36:07,148 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) [2021-07-09 17:36:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 947 transitions. [2021-07-09 17:36:07,149 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 947 transitions. Word has length 19 [2021-07-09 17:36:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,149 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 947 transitions. [2021-07-09 17:36:07,149 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) [2021-07-09 17:36:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 947 transitions. [2021-07-09 17:36:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:07,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,150 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:07,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:07,373 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:07,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1346948354, now seen corresponding path program 13 times [2021-07-09 17:36:07,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:07,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284258781] [2021-07-09 17:36:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284258781] [2021-07-09 17:36:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284258781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350594721] [2021-07-09 17:36:07,433 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 [2021-07-09 17:36:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:07,563 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 12 treesize of output 8 [2021-07-09 17:36:07,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:07,567 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 [2021-07-09 17:36:07,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:07,583 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:36:07,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:07,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:36:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350594721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:07,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:36:07,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894584329] [2021-07-09 17:36:07,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:07,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:07,634 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) [2021-07-09 17:36:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,902 INFO L93 Difference]: Finished difference Result 486 states and 1487 transitions. [2021-07-09 17:36:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:07,903 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 [2021-07-09 17:36:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,904 INFO L225 Difference]: With dead ends: 486 [2021-07-09 17:36:07,905 INFO L226 Difference]: Without dead ends: 434 [2021-07-09 17:36:07,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-09 17:36:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 283. [2021-07-09 17:36:07,912 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) [2021-07-09 17:36:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 927 transitions. [2021-07-09 17:36:07,913 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 927 transitions. Word has length 20 [2021-07-09 17:36:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,913 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 927 transitions. [2021-07-09 17:36:07,913 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) [2021-07-09 17:36:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 927 transitions. [2021-07-09 17:36:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:07,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,914 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:08,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:36:08,137 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 513236125, now seen corresponding path program 14 times [2021-07-09 17:36:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:08,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633130107] [2021-07-09 17:36:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633130107] [2021-07-09 17:36:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633130107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896391920] [2021-07-09 17:36:08,215 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 [2021-07-09 17:36:08,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:08,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:08,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:08,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:08,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,340 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:36:08,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:08,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-09 17:36:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896391920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:08,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:36:08,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324658066] [2021-07-09 17:36:08,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:36:08,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:36:08,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:36:08,354 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) [2021-07-09 17:36:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:08,620 INFO L93 Difference]: Finished difference Result 488 states and 1470 transitions. [2021-07-09 17:36:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:08,621 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 [2021-07-09 17:36:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:08,623 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:36:08,623 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:36:08,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:36:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-07-09 17:36:08,631 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) [2021-07-09 17:36:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1036 transitions. [2021-07-09 17:36:08,632 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1036 transitions. Word has length 20 [2021-07-09 17:36:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:08,632 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1036 transitions. [2021-07-09 17:36:08,632 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) [2021-07-09 17:36:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1036 transitions. [2021-07-09 17:36:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:08,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:08,633 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:08,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:08,849 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1671879655, now seen corresponding path program 15 times [2021-07-09 17:36:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:08,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674436706] [2021-07-09 17:36:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674436706] [2021-07-09 17:36:08,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674436706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878456765] [2021-07-09 17:36:08,922 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 [2021-07-09 17:36:08,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:08,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:09,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:09,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:09,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:09,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:09,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:09,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-09 17:36:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878456765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:09,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:36:09,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289688580] [2021-07-09 17:36:09,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:36:09,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:36:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:36:09,100 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) [2021-07-09 17:36:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,375 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2021-07-09 17:36:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:09,375 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 [2021-07-09 17:36:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,377 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:36:09,377 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:36:09,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:36:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 329. [2021-07-09 17:36:09,385 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) [2021-07-09 17:36:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1047 transitions. [2021-07-09 17:36:09,386 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1047 transitions. Word has length 20 [2021-07-09 17:36:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,387 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1047 transitions. [2021-07-09 17:36:09,387 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) [2021-07-09 17:36:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1047 transitions. [2021-07-09 17:36:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:09,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,388 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:09,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 17:36:09,605 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 177971933, now seen corresponding path program 16 times [2021-07-09 17:36:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:09,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462866283] [2021-07-09 17:36:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462866283] [2021-07-09 17:36:09,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462866283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81844327] [2021-07-09 17:36:09,665 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 [2021-07-09 17:36:09,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:09,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:09,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:09,809 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:36:09,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:09,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-09 17:36:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81844327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:09,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:36:09,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476760198] [2021-07-09 17:36:09,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:36:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:36:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:36:09,838 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) [2021-07-09 17:36:10,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:10,092 INFO L93 Difference]: Finished difference Result 497 states and 1488 transitions. [2021-07-09 17:36:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:10,092 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 [2021-07-09 17:36:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:10,094 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:36:10,094 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:36:10,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:36:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 329. [2021-07-09 17:36:10,108 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) [2021-07-09 17:36:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1044 transitions. [2021-07-09 17:36:10,110 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1044 transitions. Word has length 20 [2021-07-09 17:36:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:10,110 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1044 transitions. [2021-07-09 17:36:10,110 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) [2021-07-09 17:36:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1044 transitions. [2021-07-09 17:36:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:10,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:10,111 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:10,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-09 17:36:10,334 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1528996053, now seen corresponding path program 17 times [2021-07-09 17:36:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:10,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241824632] [2021-07-09 17:36:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:10,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241824632] [2021-07-09 17:36:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241824632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292742659] [2021-07-09 17:36:10,412 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 [2021-07-09 17:36:10,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:10,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292742659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:10,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:10,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020236780] [2021-07-09 17:36:10,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:10,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:10,607 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) [2021-07-09 17:36:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:10,866 INFO L93 Difference]: Finished difference Result 500 states and 1492 transitions. [2021-07-09 17:36:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:10,867 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 [2021-07-09 17:36:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:10,869 INFO L225 Difference]: With dead ends: 500 [2021-07-09 17:36:10,869 INFO L226 Difference]: Without dead ends: 500 [2021-07-09 17:36:10,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-09 17:36:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-07-09 17:36:10,876 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) [2021-07-09 17:36:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1066 transitions. [2021-07-09 17:36:10,877 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1066 transitions. Word has length 20 [2021-07-09 17:36:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:10,877 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1066 transitions. [2021-07-09 17:36:10,878 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) [2021-07-09 17:36:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1066 transitions. [2021-07-09 17:36:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:10,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:10,879 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 17:36:11,102 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1272063521, now seen corresponding path program 18 times [2021-07-09 17:36:11,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113573472] [2021-07-09 17:36:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:11,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113573472] [2021-07-09 17:36:11,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113573472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610642713] [2021-07-09 17:36:11,165 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 [2021-07-09 17:36:11,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:11,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610642713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:11,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635658723] [2021-07-09 17:36:11,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:11,354 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) [2021-07-09 17:36:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,680 INFO L93 Difference]: Finished difference Result 506 states and 1499 transitions. [2021-07-09 17:36:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:11,680 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 [2021-07-09 17:36:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,682 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:36:11,682 INFO L226 Difference]: Without dead ends: 500 [2021-07-09 17:36:11,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-09 17:36:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 332. [2021-07-09 17:36:11,689 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) [2021-07-09 17:36:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1055 transitions. [2021-07-09 17:36:11,690 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1055 transitions. Word has length 20 [2021-07-09 17:36:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,690 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1055 transitions. [2021-07-09 17:36:11,690 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) [2021-07-09 17:36:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1055 transitions. [2021-07-09 17:36:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:11,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,691 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 17:36:11,913 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1809919099, now seen corresponding path program 19 times [2021-07-09 17:36:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828021351] [2021-07-09 17:36:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:11,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828021351] [2021-07-09 17:36:11,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828021351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282029076] [2021-07-09 17:36:11,971 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 [2021-07-09 17:36:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282029076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324692739] [2021-07-09 17:36:12,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:12,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:12,153 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) [2021-07-09 17:36:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:12,432 INFO L93 Difference]: Finished difference Result 464 states and 1404 transitions. [2021-07-09 17:36:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:12,432 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 [2021-07-09 17:36:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:12,434 INFO L225 Difference]: With dead ends: 464 [2021-07-09 17:36:12,434 INFO L226 Difference]: Without dead ends: 452 [2021-07-09 17:36:12,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-09 17:36:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 332. [2021-07-09 17:36:12,441 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) [2021-07-09 17:36:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1052 transitions. [2021-07-09 17:36:12,442 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1052 transitions. Word has length 20 [2021-07-09 17:36:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:12,442 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1052 transitions. [2021-07-09 17:36:12,442 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) [2021-07-09 17:36:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1052 transitions. [2021-07-09 17:36:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:12,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:12,443 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:12,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:12,657 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1880172963, now seen corresponding path program 20 times [2021-07-09 17:36:12,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:12,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541751833] [2021-07-09 17:36:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541751833] [2021-07-09 17:36:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541751833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298358117] [2021-07-09 17:36:12,731 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 [2021-07-09 17:36:12,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298358117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741183447] [2021-07-09 17:36:12,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:12,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:12,923 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) [2021-07-09 17:36:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:13,261 INFO L93 Difference]: Finished difference Result 554 states and 1629 transitions. [2021-07-09 17:36:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:13,261 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 [2021-07-09 17:36:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:13,263 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:36:13,263 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:36:13,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:36:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 341. [2021-07-09 17:36:13,270 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) [2021-07-09 17:36:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1085 transitions. [2021-07-09 17:36:13,271 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1085 transitions. Word has length 20 [2021-07-09 17:36:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:13,272 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1085 transitions. [2021-07-09 17:36:13,272 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) [2021-07-09 17:36:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1085 transitions. [2021-07-09 17:36:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:13,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:13,273 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:13,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,492 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash 386265241, now seen corresponding path program 21 times [2021-07-09 17:36:13,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:13,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170224285] [2021-07-09 17:36:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170224285] [2021-07-09 17:36:13,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170224285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108694600] [2021-07-09 17:36:13,566 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 [2021-07-09 17:36:13,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108694600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:13,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197725596] [2021-07-09 17:36:13,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:13,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:13,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:13,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:13,741 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) [2021-07-09 17:36:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,145 INFO L93 Difference]: Finished difference Result 560 states and 1636 transitions. [2021-07-09 17:36:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:14,145 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 [2021-07-09 17:36:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,147 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:36:14,147 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:36:14,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:36:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 338. [2021-07-09 17:36:14,162 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) [2021-07-09 17:36:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1074 transitions. [2021-07-09 17:36:14,163 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1074 transitions. Word has length 20 [2021-07-09 17:36:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,163 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1074 transitions. [2021-07-09 17:36:14,163 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) [2021-07-09 17:36:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1074 transitions. [2021-07-09 17:36:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:14,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,165 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:14,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-09 17:36:14,381 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash 924120819, now seen corresponding path program 22 times [2021-07-09 17:36:14,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:14,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859857337] [2021-07-09 17:36:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:14,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859857337] [2021-07-09 17:36:14,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859857337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743270778] [2021-07-09 17:36:14,443 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 [2021-07-09 17:36:14,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743270778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:14,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373863506] [2021-07-09 17:36:14,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:14,614 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) [2021-07-09 17:36:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,955 INFO L93 Difference]: Finished difference Result 524 states and 1554 transitions. [2021-07-09 17:36:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:14,955 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 [2021-07-09 17:36:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,957 INFO L225 Difference]: With dead ends: 524 [2021-07-09 17:36:14,957 INFO L226 Difference]: Without dead ends: 512 [2021-07-09 17:36:14,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-09 17:36:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-07-09 17:36:14,964 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) [2021-07-09 17:36:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1063 transitions. [2021-07-09 17:36:14,965 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1063 transitions. Word has length 20 [2021-07-09 17:36:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,965 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1063 transitions. [2021-07-09 17:36:14,966 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) [2021-07-09 17:36:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1063 transitions. [2021-07-09 17:36:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:14,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,967 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,181 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1511866141, now seen corresponding path program 23 times [2021-07-09 17:36:15,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666603346] [2021-07-09 17:36:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666603346] [2021-07-09 17:36:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666603346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381157632] [2021-07-09 17:36:15,238 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 [2021-07-09 17:36:15,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381157632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:15,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:36:15,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021562532] [2021-07-09 17:36:15,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:36:15,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:36:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:36:15,385 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) [2021-07-09 17:36:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:15,679 INFO L93 Difference]: Finished difference Result 515 states and 1530 transitions. [2021-07-09 17:36:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:15,679 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 [2021-07-09 17:36:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:15,681 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:36:15,681 INFO L226 Difference]: Without dead ends: 497 [2021-07-09 17:36:15,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-09 17:36:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 335. [2021-07-09 17:36:15,686 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) [2021-07-09 17:36:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-09 17:36:15,687 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-09 17:36:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:15,688 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-09 17:36:15,688 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) [2021-07-09 17:36:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-09 17:36:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:15,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:15,689 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-09 17:36:15,912 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash 426307966, now seen corresponding path program 24 times [2021-07-09 17:36:15,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687329177] [2021-07-09 17:36:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687329177] [2021-07-09 17:36:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687329177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166471627] [2021-07-09 17:36:15,968 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 [2021-07-09 17:36:16,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:16,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:16,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:16,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,093 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:36:16,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:16,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:36:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166471627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:16,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:36:16,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20865830] [2021-07-09 17:36:16,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:16,156 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) [2021-07-09 17:36:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:16,480 INFO L93 Difference]: Finished difference Result 487 states and 1495 transitions. [2021-07-09 17:36:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:16,480 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 [2021-07-09 17:36:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:16,482 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:36:16,483 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:36:16,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:36:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-07-09 17:36:16,488 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) [2021-07-09 17:36:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-09 17:36:16,489 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-09 17:36:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:16,489 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-09 17:36:16,490 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) [2021-07-09 17:36:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-09 17:36:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:16,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:16,490 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:16,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:16,704 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1652166947, now seen corresponding path program 25 times [2021-07-09 17:36:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195056424] [2021-07-09 17:36:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195056424] [2021-07-09 17:36:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195056424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195387436] [2021-07-09 17:36:16,767 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 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 [2021-07-09 17:36:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:16,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:16,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,917 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:36:16,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:16,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-09 17:36:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195387436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:16,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:16,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633150004] [2021-07-09 17:36:16,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:16,944 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) [2021-07-09 17:36:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:17,165 INFO L93 Difference]: Finished difference Result 542 states and 1611 transitions. [2021-07-09 17:36:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:17,165 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 [2021-07-09 17:36:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:17,167 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:36:17,167 INFO L226 Difference]: Without dead ends: 542 [2021-07-09 17:36:17,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-09 17:36:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 345. [2021-07-09 17:36:17,178 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) [2021-07-09 17:36:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1086 transitions. [2021-07-09 17:36:17,179 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1086 transitions. Word has length 20 [2021-07-09 17:36:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:17,179 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1086 transitions. [2021-07-09 17:36:17,179 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) [2021-07-09 17:36:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1086 transitions. [2021-07-09 17:36:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:17,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:17,180 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:17,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-09 17:36:17,401 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1484156819, now seen corresponding path program 26 times [2021-07-09 17:36:17,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:17,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803338634] [2021-07-09 17:36:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803338634] [2021-07-09 17:36:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803338634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180376193] [2021-07-09 17:36:17,477 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 [2021-07-09 17:36:17,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:17,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:17,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:17,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:17,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:17,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:17,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,654 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:36:17,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:17,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-09 17:36:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180376193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794342995] [2021-07-09 17:36:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:17,686 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) [2021-07-09 17:36:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:17,923 INFO L93 Difference]: Finished difference Result 594 states and 1732 transitions. [2021-07-09 17:36:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:17,924 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 [2021-07-09 17:36:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:17,927 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:36:17,927 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:36:17,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:36:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 348. [2021-07-09 17:36:17,934 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) [2021-07-09 17:36:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1097 transitions. [2021-07-09 17:36:17,935 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1097 transitions. Word has length 20 [2021-07-09 17:36:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:17,935 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1097 transitions. [2021-07-09 17:36:17,935 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) [2021-07-09 17:36:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1097 transitions. [2021-07-09 17:36:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:17,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:17,936 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:18,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,159 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1316902755, now seen corresponding path program 27 times [2021-07-09 17:36:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:18,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620729809] [2021-07-09 17:36:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:18,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620729809] [2021-07-09 17:36:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620729809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787967128] [2021-07-09 17:36:18,229 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 [2021-07-09 17:36:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:18,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:18,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:18,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,379 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:36:18,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:18,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-09 17:36:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787967128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:18,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100109402] [2021-07-09 17:36:18,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:18,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:18,416 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) [2021-07-09 17:36:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:18,659 INFO L93 Difference]: Finished difference Result 551 states and 1629 transitions. [2021-07-09 17:36:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:18,660 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 [2021-07-09 17:36:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:18,661 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:36:18,661 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 17:36:18,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 17:36:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 340. [2021-07-09 17:36:18,668 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) [2021-07-09 17:36:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1073 transitions. [2021-07-09 17:36:18,669 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1073 transitions. Word has length 20 [2021-07-09 17:36:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:18,669 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1073 transitions. [2021-07-09 17:36:18,669 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) [2021-07-09 17:36:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1073 transitions. [2021-07-09 17:36:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:18,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:18,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:18,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-09 17:36:18,885 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:18,885 INFO L82 PathProgramCache]: Analyzing trace with hash -390065231, now seen corresponding path program 28 times [2021-07-09 17:36:18,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:18,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108475970] [2021-07-09 17:36:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:18,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:18,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108475970] [2021-07-09 17:36:18,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108475970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283411474] [2021-07-09 17:36:18,959 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 [2021-07-09 17:36:19,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:19,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:19,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283411474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:19,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:19,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896251699] [2021-07-09 17:36:19,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:19,167 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) [2021-07-09 17:36:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,420 INFO L93 Difference]: Finished difference Result 520 states and 1545 transitions. [2021-07-09 17:36:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:19,421 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 [2021-07-09 17:36:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,422 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:36:19,423 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:36:19,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:36:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2021-07-09 17:36:19,429 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) [2021-07-09 17:36:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1095 transitions. [2021-07-09 17:36:19,430 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1095 transitions. Word has length 20 [2021-07-09 17:36:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,430 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1095 transitions. [2021-07-09 17:36:19,430 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) [2021-07-09 17:36:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1095 transitions. [2021-07-09 17:36:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:19,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,431 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:19,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,633 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1883972953, now seen corresponding path program 29 times [2021-07-09 17:36:19,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:19,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720723543] [2021-07-09 17:36:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:19,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720723543] [2021-07-09 17:36:19,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720723543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257551579] [2021-07-09 17:36:19,702 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 [2021-07-09 17:36:19,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257551579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:19,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:19,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96609153] [2021-07-09 17:36:19,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:19,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:19,937 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) [2021-07-09 17:36:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,270 INFO L93 Difference]: Finished difference Result 526 states and 1552 transitions. [2021-07-09 17:36:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:20,271 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 [2021-07-09 17:36:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,273 INFO L225 Difference]: With dead ends: 526 [2021-07-09 17:36:20,273 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:36:20,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:36:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2021-07-09 17:36:20,281 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) [2021-07-09 17:36:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1084 transitions. [2021-07-09 17:36:20,283 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1084 transitions. Word has length 20 [2021-07-09 17:36:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,283 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1084 transitions. [2021-07-09 17:36:20,283 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) [2021-07-09 17:36:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1084 transitions. [2021-07-09 17:36:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:20,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,285 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:20,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 17:36:20,501 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1346117375, now seen corresponding path program 30 times [2021-07-09 17:36:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:20,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346823066] [2021-07-09 17:36:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:20,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346823066] [2021-07-09 17:36:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346823066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938193662] [2021-07-09 17:36:20,569 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 [2021-07-09 17:36:20,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938193662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:20,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132719787] [2021-07-09 17:36:20,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:20,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:20,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:20,780 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) [2021-07-09 17:36:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:21,058 INFO L93 Difference]: Finished difference Result 484 states and 1457 transitions. [2021-07-09 17:36:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:21,058 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 [2021-07-09 17:36:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:21,060 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:36:21,060 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:36:21,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:36:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 335. [2021-07-09 17:36:21,068 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) [2021-07-09 17:36:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-07-09 17:36:21,069 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-07-09 17:36:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:21,069 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-07-09 17:36:21,069 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) [2021-07-09 17:36:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-07-09 17:36:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:21,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:21,070 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:21,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 17:36:21,285 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1184106974, now seen corresponding path program 31 times [2021-07-09 17:36:21,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686081946] [2021-07-09 17:36:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686081946] [2021-07-09 17:36:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686081946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105979696] [2021-07-09 17:36:21,345 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 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 [2021-07-09 17:36:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:21,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,518 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-09 17:36:21,522 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 6 treesize of output 4 [2021-07-09 17:36:21,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:21,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,556 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:36:21,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:21,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-07-09 17:36:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105979696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:36:21,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24969298] [2021-07-09 17:36:21,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:21,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:21,639 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) [2021-07-09 17:36:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:21,993 INFO L93 Difference]: Finished difference Result 528 states and 1594 transitions. [2021-07-09 17:36:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:21,994 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 [2021-07-09 17:36:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:21,996 INFO L225 Difference]: With dead ends: 528 [2021-07-09 17:36:21,996 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 17:36:21,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 17:36:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 340. [2021-07-09 17:36:22,001 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) [2021-07-09 17:36:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1085 transitions. [2021-07-09 17:36:22,002 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1085 transitions. Word has length 20 [2021-07-09 17:36:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1085 transitions. [2021-07-09 17:36:22,002 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) [2021-07-09 17:36:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1085 transitions. [2021-07-09 17:36:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:22,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:22,003 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,217 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2101485159, now seen corresponding path program 32 times [2021-07-09 17:36:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920821041] [2021-07-09 17:36:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:22,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920821041] [2021-07-09 17:36:22,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920821041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512583933] [2021-07-09 17:36:22,298 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 [2021-07-09 17:36:22,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:22,452 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 5 treesize of output 3 [2021-07-09 17:36:22,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,502 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-07-09 17:36:22,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:22,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,538 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-07-09 17:36:22,540 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 12 treesize of output 8 [2021-07-09 17:36:22,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,543 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 13 treesize of output 9 [2021-07-09 17:36:22,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,562 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:36:22,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:22,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-07-09 17:36:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512583933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:22,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:22,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759002264] [2021-07-09 17:36:22,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:22,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:22,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:22,616 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) [2021-07-09 17:36:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:23,099 INFO L93 Difference]: Finished difference Result 649 states and 1911 transitions. [2021-07-09 17:36:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:23,099 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 [2021-07-09 17:36:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:23,102 INFO L225 Difference]: With dead ends: 649 [2021-07-09 17:36:23,102 INFO L226 Difference]: Without dead ends: 649 [2021-07-09 17:36:23,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-09 17:36:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 352. [2021-07-09 17:36:23,109 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) [2021-07-09 17:36:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1126 transitions. [2021-07-09 17:36:23,111 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1126 transitions. Word has length 20 [2021-07-09 17:36:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:23,111 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1126 transitions. [2021-07-09 17:36:23,111 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) [2021-07-09 17:36:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1126 transitions. [2021-07-09 17:36:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:23,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:23,112 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:23,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,329 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash -942841629, now seen corresponding path program 33 times [2021-07-09 17:36:23,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:23,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341948627] [2021-07-09 17:36:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341948627] [2021-07-09 17:36:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341948627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820844650] [2021-07-09 17:36:23,400 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 [2021-07-09 17:36:23,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:23,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:23,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:23,559 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 6 treesize of output 4 [2021-07-09 17:36:23,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,604 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-09 17:36:23,607 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 12 treesize of output 8 [2021-07-09 17:36:23,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,610 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 13 treesize of output 9 [2021-07-09 17:36:23,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,633 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:36:23,634 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:36:23,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:23,634 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:36:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820844650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:23,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:23,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303632637] [2021-07-09 17:36:23,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:23,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:23,684 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) [2021-07-09 17:36:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:24,003 INFO L93 Difference]: Finished difference Result 701 states and 2032 transitions. [2021-07-09 17:36:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:24,004 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 [2021-07-09 17:36:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:24,007 INFO L225 Difference]: With dead ends: 701 [2021-07-09 17:36:24,007 INFO L226 Difference]: Without dead ends: 701 [2021-07-09 17:36:24,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-07-09 17:36:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 358. [2021-07-09 17:36:24,015 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) [2021-07-09 17:36:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1151 transitions. [2021-07-09 17:36:24,016 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1151 transitions. Word has length 20 [2021-07-09 17:36:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:24,017 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1151 transitions. [2021-07-09 17:36:24,017 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) [2021-07-09 17:36:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1151 transitions. [2021-07-09 17:36:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:24,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:24,018 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:24,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:24,218 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1858217945, now seen corresponding path program 34 times [2021-07-09 17:36:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:24,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633359940] [2021-07-09 17:36:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:24,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633359940] [2021-07-09 17:36:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633359940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103549667] [2021-07-09 17:36:24,288 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 [2021-07-09 17:36:24,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:24,446 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 6 treesize of output 4 [2021-07-09 17:36:24,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,450 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 [2021-07-09 17:36:24,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,480 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-09 17:36:24,485 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 [2021-07-09 17:36:24,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:24,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-09 17:36:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103549667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:24,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975672517] [2021-07-09 17:36:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:24,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:24,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:24,546 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) [2021-07-09 17:36:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:24,838 INFO L93 Difference]: Finished difference Result 658 states and 1923 transitions. [2021-07-09 17:36:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:24,838 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 [2021-07-09 17:36:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:24,841 INFO L225 Difference]: With dead ends: 658 [2021-07-09 17:36:24,841 INFO L226 Difference]: Without dead ends: 652 [2021-07-09 17:36:24,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-09 17:36:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2021-07-09 17:36:24,848 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) [2021-07-09 17:36:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1140 transitions. [2021-07-09 17:36:24,849 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1140 transitions. Word has length 20 [2021-07-09 17:36:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:24,849 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1140 transitions. [2021-07-09 17:36:24,849 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) [2021-07-09 17:36:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1140 transitions. [2021-07-09 17:36:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:24,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:24,850 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:25,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:25,065 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1690972674, now seen corresponding path program 35 times [2021-07-09 17:36:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:25,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913086955] [2021-07-09 17:36:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:25,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913086955] [2021-07-09 17:36:25,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913086955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110132515] [2021-07-09 17:36:25,117 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 [2021-07-09 17:36:25,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:25,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:25,229 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 [2021-07-09 17:36:25,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:25,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:25,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,239 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 13 treesize of output 9 [2021-07-09 17:36:25,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,271 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-09 17:36:25,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:25,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-09 17:36:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110132515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:36:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161824769] [2021-07-09 17:36:25,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:25,341 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) [2021-07-09 17:36:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:25,609 INFO L93 Difference]: Finished difference Result 461 states and 1410 transitions. [2021-07-09 17:36:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:25,609 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 [2021-07-09 17:36:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:25,611 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:36:25,611 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 17:36:25,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 17:36:25,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 347. [2021-07-09 17:36:25,616 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) [2021-07-09 17:36:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1099 transitions. [2021-07-09 17:36:25,617 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1099 transitions. Word has length 20 [2021-07-09 17:36:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:25,617 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1099 transitions. [2021-07-09 17:36:25,617 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) [2021-07-09 17:36:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1099 transitions. [2021-07-09 17:36:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:25,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:25,618 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:25,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-09 17:36:25,829 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -282908061, now seen corresponding path program 36 times [2021-07-09 17:36:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:25,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600284475] [2021-07-09 17:36:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600284475] [2021-07-09 17:36:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600284475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101605772] [2021-07-09 17:36:25,899 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 [2021-07-09 17:36:25,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:26,059 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 6 treesize of output 4 [2021-07-09 17:36:26,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:26,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,094 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-09 17:36:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:26,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:26,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:26,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:36:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101605772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:26,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:26,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268624737] [2021-07-09 17:36:26,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:26,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:26,181 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) [2021-07-09 17:36:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:26,481 INFO L93 Difference]: Finished difference Result 602 states and 1789 transitions. [2021-07-09 17:36:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:26,489 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 [2021-07-09 17:36:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:26,491 INFO L225 Difference]: With dead ends: 602 [2021-07-09 17:36:26,491 INFO L226 Difference]: Without dead ends: 602 [2021-07-09 17:36:26,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-09 17:36:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 337. [2021-07-09 17:36:26,498 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) [2021-07-09 17:36:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1068 transitions. [2021-07-09 17:36:26,499 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1068 transitions. Word has length 20 [2021-07-09 17:36:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:26,499 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1068 transitions. [2021-07-09 17:36:26,499 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) [2021-07-09 17:36:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1068 transitions. [2021-07-09 17:36:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:26,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:26,500 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,723 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1350143331, now seen corresponding path program 37 times [2021-07-09 17:36:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833940644] [2021-07-09 17:36:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:26,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:26,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833940644] [2021-07-09 17:36:26,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833940644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988080224] [2021-07-09 17:36:26,796 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 [2021-07-09 17:36:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:26,937 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 6 treesize of output 4 [2021-07-09 17:36:26,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,974 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-09 17:36:26,977 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 [2021-07-09 17:36:26,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,979 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 12 treesize of output 8 [2021-07-09 17:36:26,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:26,999 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:36:26,999 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:36:27,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:27,000 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:36:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988080224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:27,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012183033] [2021-07-09 17:36:27,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:27,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:27,093 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) [2021-07-09 17:36:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:27,594 INFO L93 Difference]: Finished difference Result 598 states and 1773 transitions. [2021-07-09 17:36:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:27,595 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 [2021-07-09 17:36:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:27,597 INFO L225 Difference]: With dead ends: 598 [2021-07-09 17:36:27,597 INFO L226 Difference]: Without dead ends: 598 [2021-07-09 17:36:27,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-09 17:36:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 340. [2021-07-09 17:36:27,604 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) [2021-07-09 17:36:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-07-09 17:36:27,605 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-07-09 17:36:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:27,605 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-07-09 17:36:27,605 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) [2021-07-09 17:36:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-07-09 17:36:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:27,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:27,606 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:27,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,821 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -606993625, now seen corresponding path program 38 times [2021-07-09 17:36:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:27,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655127377] [2021-07-09 17:36:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655127377] [2021-07-09 17:36:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655127377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644993041] [2021-07-09 17:36:27,905 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 [2021-07-09 17:36:27,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:28,054 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 6 treesize of output 4 [2021-07-09 17:36:28,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,092 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-07-09 17:36:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:28,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:28,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,128 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:36:28,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:28,129 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-09 17:36:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644993041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:28,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:28,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636213636] [2021-07-09 17:36:28,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:28,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:28,215 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) [2021-07-09 17:36:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:28,512 INFO L93 Difference]: Finished difference Result 536 states and 1630 transitions. [2021-07-09 17:36:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:28,513 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 [2021-07-09 17:36:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:28,514 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:36:28,514 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:36:28,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:36:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-07-09 17:36:28,520 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) [2021-07-09 17:36:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-07-09 17:36:28,520 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-07-09 17:36:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:28,521 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-07-09 17:36:28,521 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) [2021-07-09 17:36:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-07-09 17:36:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:28,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:28,521 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:28,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:28,722 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 681956465, now seen corresponding path program 39 times [2021-07-09 17:36:28,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271605704] [2021-07-09 17:36:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271605704] [2021-07-09 17:36:28,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271605704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140157580] [2021-07-09 17:36:28,799 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 [2021-07-09 17:36:28,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:28,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:28,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:28,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,989 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-09 17:36:28,992 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 6 treesize of output 4 [2021-07-09 17:36:28,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,015 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-07-09 17:36:29,015 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:36:29,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:29,016 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:36:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:29,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140157580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:29,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:29,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298898857] [2021-07-09 17:36:29,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:29,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:29,102 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) [2021-07-09 17:36:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:29,475 INFO L93 Difference]: Finished difference Result 646 states and 1914 transitions. [2021-07-09 17:36:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:29,475 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 [2021-07-09 17:36:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:29,477 INFO L225 Difference]: With dead ends: 646 [2021-07-09 17:36:29,477 INFO L226 Difference]: Without dead ends: 646 [2021-07-09 17:36:29,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-09 17:36:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 348. [2021-07-09 17:36:29,482 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) [2021-07-09 17:36:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1119 transitions. [2021-07-09 17:36:29,483 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1119 transitions. Word has length 20 [2021-07-09 17:36:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:29,483 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1119 transitions. [2021-07-09 17:36:29,483 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) [2021-07-09 17:36:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1119 transitions. [2021-07-09 17:36:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:29,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:29,484 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:29,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 17:36:29,684 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash -811951257, now seen corresponding path program 40 times [2021-07-09 17:36:29,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:29,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858573661] [2021-07-09 17:36:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:29,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858573661] [2021-07-09 17:36:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858573661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654128272] [2021-07-09 17:36:29,749 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 [2021-07-09 17:36:29,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:29,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:29,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:29,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:29,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:29,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,921 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-07-09 17:36:29,923 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 6 treesize of output 4 [2021-07-09 17:36:29,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,944 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-09 17:36:29,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:29,945 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-07-09 17:36:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654128272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634907197] [2021-07-09 17:36:30,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:30,026 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) [2021-07-09 17:36:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:30,376 INFO L93 Difference]: Finished difference Result 632 states and 1863 transitions. [2021-07-09 17:36:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:30,376 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 [2021-07-09 17:36:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:30,377 INFO L225 Difference]: With dead ends: 632 [2021-07-09 17:36:30,377 INFO L226 Difference]: Without dead ends: 626 [2021-07-09 17:36:30,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-07-09 17:36:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 351. [2021-07-09 17:36:30,383 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) [2021-07-09 17:36:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1121 transitions. [2021-07-09 17:36:30,383 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1121 transitions. Word has length 20 [2021-07-09 17:36:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:30,384 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1121 transitions. [2021-07-09 17:36:30,384 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) [2021-07-09 17:36:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1121 transitions. [2021-07-09 17:36:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:30,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:30,385 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:30,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,589 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1433356903, now seen corresponding path program 41 times [2021-07-09 17:36:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:30,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493401554] [2021-07-09 17:36:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493401554] [2021-07-09 17:36:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493401554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336108360] [2021-07-09 17:36:30,679 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 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 [2021-07-09 17:36:30,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:30,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:30,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:30,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,882 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 17:36:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:30,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:30,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,922 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-07-09 17:36:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:30,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,946 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-09 17:36:30,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:30,946 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:36:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336108360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:31,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:31,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509392324] [2021-07-09 17:36:31,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:31,051 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) [2021-07-09 17:36:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:31,530 INFO L93 Difference]: Finished difference Result 677 states and 1978 transitions. [2021-07-09 17:36:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:31,531 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 [2021-07-09 17:36:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:31,532 INFO L225 Difference]: With dead ends: 677 [2021-07-09 17:36:31,532 INFO L226 Difference]: Without dead ends: 677 [2021-07-09 17:36:31,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-09 17:36:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 344. [2021-07-09 17:36:31,537 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) [2021-07-09 17:36:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1103 transitions. [2021-07-09 17:36:31,538 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1103 transitions. Word has length 20 [2021-07-09 17:36:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:31,538 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1103 transitions. [2021-07-09 17:36:31,538 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) [2021-07-09 17:36:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1103 transitions. [2021-07-09 17:36:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:31,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:31,539 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:31,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,740 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1569267993, now seen corresponding path program 42 times [2021-07-09 17:36:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:31,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584442585] [2021-07-09 17:36:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:31,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584442585] [2021-07-09 17:36:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584442585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632181343] [2021-07-09 17:36:31,807 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 [2021-07-09 17:36:31,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:31,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:31,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:31,952 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 12 treesize of output 8 [2021-07-09 17:36:31,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,956 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 [2021-07-09 17:36:31,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:31,984 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 [2021-07-09 17:36:31,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,987 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 [2021-07-09 17:36:31,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,009 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:36:32,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:32,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:36:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632181343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:32,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:32,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026529417] [2021-07-09 17:36:32,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:32,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:32,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:32,092 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) [2021-07-09 17:36:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:32,424 INFO L93 Difference]: Finished difference Result 611 states and 1830 transitions. [2021-07-09 17:36:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:32,424 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 [2021-07-09 17:36:32,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:32,426 INFO L225 Difference]: With dead ends: 611 [2021-07-09 17:36:32,426 INFO L226 Difference]: Without dead ends: 611 [2021-07-09 17:36:32,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-09 17:36:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 341. [2021-07-09 17:36:32,431 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) [2021-07-09 17:36:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1088 transitions. [2021-07-09 17:36:32,431 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1088 transitions. Word has length 20 [2021-07-09 17:36:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:32,432 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1088 transitions. [2021-07-09 17:36:32,432 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) [2021-07-09 17:36:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1088 transitions. [2021-07-09 17:36:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:32,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:32,433 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:32,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:32,634 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1454093431, now seen corresponding path program 43 times [2021-07-09 17:36:32,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:32,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805085764] [2021-07-09 17:36:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:32,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805085764] [2021-07-09 17:36:32,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805085764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955305716] [2021-07-09 17:36:32,701 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 [2021-07-09 17:36:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:32,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:32,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,849 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 12 treesize of output 8 [2021-07-09 17:36:32,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,895 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-07-09 17:36:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:32,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,926 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-07-09 17:36:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:32,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,948 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:36:32,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:32,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-09 17:36:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:33,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955305716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:33,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150756693] [2021-07-09 17:36:33,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:33,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:33,029 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) [2021-07-09 17:36:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:33,512 INFO L93 Difference]: Finished difference Result 583 states and 1732 transitions. [2021-07-09 17:36:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:33,512 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 [2021-07-09 17:36:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:33,513 INFO L225 Difference]: With dead ends: 583 [2021-07-09 17:36:33,513 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 17:36:33,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 17:36:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 351. [2021-07-09 17:36:33,519 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) [2021-07-09 17:36:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1115 transitions. [2021-07-09 17:36:33,519 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1115 transitions. Word has length 20 [2021-07-09 17:36:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:33,519 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1115 transitions. [2021-07-09 17:36:33,520 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) [2021-07-09 17:36:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1115 transitions. [2021-07-09 17:36:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:33,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:33,520 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:33,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,721 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -461330495, now seen corresponding path program 44 times [2021-07-09 17:36:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:33,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084850675] [2021-07-09 17:36:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:33,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084850675] [2021-07-09 17:36:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084850675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271950547] [2021-07-09 17:36:33,808 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 [2021-07-09 17:36:33,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:33,947 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 13 treesize of output 9 [2021-07-09 17:36:33,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:36:33,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,002 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-09 17:36:34,005 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 6 treesize of output 4 [2021-07-09 17:36:34,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,032 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-07-09 17:36:34,032 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:36:34,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:34,033 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:36:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271950547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:34,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:34,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376157173] [2021-07-09 17:36:34,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:34,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:34,118 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) [2021-07-09 17:36:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:34,395 INFO L93 Difference]: Finished difference Result 554 states and 1678 transitions. [2021-07-09 17:36:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:34,396 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 [2021-07-09 17:36:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:34,397 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:36:34,397 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:36:34,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:36:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 343. [2021-07-09 17:36:34,402 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) [2021-07-09 17:36:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1093 transitions. [2021-07-09 17:36:34,402 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1093 transitions. Word has length 20 [2021-07-09 17:36:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1093 transitions. [2021-07-09 17:36:34,402 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) [2021-07-09 17:36:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1093 transitions. [2021-07-09 17:36:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:34,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:34,403 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:34,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-07-09 17:36:34,604 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1560931869, now seen corresponding path program 45 times [2021-07-09 17:36:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760380907] [2021-07-09 17:36:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760380907] [2021-07-09 17:36:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760380907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812166271] [2021-07-09 17:36:34,674 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 [2021-07-09 17:36:34,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:34,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:34,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812166271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:34,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:34,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96301120] [2021-07-09 17:36:34,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:34,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:34,918 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) [2021-07-09 17:36:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:35,197 INFO L93 Difference]: Finished difference Result 531 states and 1604 transitions. [2021-07-09 17:36:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:35,198 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 [2021-07-09 17:36:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:35,199 INFO L225 Difference]: With dead ends: 531 [2021-07-09 17:36:35,199 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:36:35,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:36:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 350. [2021-07-09 17:36:35,204 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) [2021-07-09 17:36:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1120 transitions. [2021-07-09 17:36:35,205 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1120 transitions. Word has length 20 [2021-07-09 17:36:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:35,205 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1120 transitions. [2021-07-09 17:36:35,205 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) [2021-07-09 17:36:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1120 transitions. [2021-07-09 17:36:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:35,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:35,206 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:35,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:35,406 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1240127705, now seen corresponding path program 46 times [2021-07-09 17:36:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:35,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209901967] [2021-07-09 17:36:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:35,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209901967] [2021-07-09 17:36:35,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209901967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135965385] [2021-07-09 17:36:35,476 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 [2021-07-09 17:36:35,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135965385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:35,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106273044] [2021-07-09 17:36:35,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:35,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:35,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:35,697 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) [2021-07-09 17:36:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:36,043 INFO L93 Difference]: Finished difference Result 537 states and 1611 transitions. [2021-07-09 17:36:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:36,043 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 [2021-07-09 17:36:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:36,044 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:36:36,044 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:36:36,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:36:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 347. [2021-07-09 17:36:36,049 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) [2021-07-09 17:36:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1109 transitions. [2021-07-09 17:36:36,050 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1109 transitions. Word has length 20 [2021-07-09 17:36:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:36,050 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1109 transitions. [2021-07-09 17:36:36,050 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) [2021-07-09 17:36:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1109 transitions. [2021-07-09 17:36:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:36,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:36,051 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:36,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 17:36:36,252 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:36,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1777983283, now seen corresponding path program 47 times [2021-07-09 17:36:36,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:36,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198165514] [2021-07-09 17:36:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:36,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:36,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198165514] [2021-07-09 17:36:36,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198165514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024834803] [2021-07-09 17:36:36,323 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 [2021-07-09 17:36:36,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:36,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024834803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:36,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:36,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020777068] [2021-07-09 17:36:36,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:36,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:36,523 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) [2021-07-09 17:36:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:36,831 INFO L93 Difference]: Finished difference Result 501 states and 1529 transitions. [2021-07-09 17:36:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:36,831 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 [2021-07-09 17:36:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:36,832 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:36:36,832 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:36:36,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:36:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 344. [2021-07-09 17:36:36,838 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) [2021-07-09 17:36:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-07-09 17:36:36,839 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-07-09 17:36:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:36,839 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-07-09 17:36:36,839 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) [2021-07-09 17:36:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-07-09 17:36:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:36,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:36,840 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:37,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,045 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 257645229, now seen corresponding path program 48 times [2021-07-09 17:36:37,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:37,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468729343] [2021-07-09 17:36:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:37,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468729343] [2021-07-09 17:36:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468729343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83034807] [2021-07-09 17:36:37,124 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 [2021-07-09 17:36:37,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83034807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:37,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063442732] [2021-07-09 17:36:37,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:37,397 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) [2021-07-09 17:36:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:37,838 INFO L93 Difference]: Finished difference Result 615 states and 1814 transitions. [2021-07-09 17:36:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:37,838 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 [2021-07-09 17:36:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:37,840 INFO L225 Difference]: With dead ends: 615 [2021-07-09 17:36:37,840 INFO L226 Difference]: Without dead ends: 615 [2021-07-09 17:36:37,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-09 17:36:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 352. [2021-07-09 17:36:37,846 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) [2021-07-09 17:36:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1134 transitions. [2021-07-09 17:36:37,846 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1134 transitions. Word has length 20 [2021-07-09 17:36:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:37,847 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1134 transitions. [2021-07-09 17:36:37,847 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) [2021-07-09 17:36:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1134 transitions. [2021-07-09 17:36:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:37,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:37,847 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:38,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:38,052 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1236262493, now seen corresponding path program 49 times [2021-07-09 17:36:38,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:38,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933235163] [2021-07-09 17:36:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:38,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:38,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933235163] [2021-07-09 17:36:38,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933235163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840348882] [2021-07-09 17:36:38,118 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 [2021-07-09 17:36:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840348882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:38,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900164245] [2021-07-09 17:36:38,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:38,359 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) [2021-07-09 17:36:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:38,935 INFO L93 Difference]: Finished difference Result 621 states and 1815 transitions. [2021-07-09 17:36:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:38,936 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 [2021-07-09 17:36:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:38,937 INFO L225 Difference]: With dead ends: 621 [2021-07-09 17:36:38,937 INFO L226 Difference]: Without dead ends: 615 [2021-07-09 17:36:38,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-09 17:36:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 355. [2021-07-09 17:36:38,945 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) [2021-07-09 17:36:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1136 transitions. [2021-07-09 17:36:38,946 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1136 transitions. Word has length 20 [2021-07-09 17:36:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:38,946 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1136 transitions. [2021-07-09 17:36:38,946 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) [2021-07-09 17:36:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1136 transitions. [2021-07-09 17:36:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:38,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:38,947 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:39,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,161 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1009045667, now seen corresponding path program 50 times [2021-07-09 17:36:39,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:39,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189807629] [2021-07-09 17:36:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:39,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189807629] [2021-07-09 17:36:39,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189807629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650795084] [2021-07-09 17:36:39,230 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 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 [2021-07-09 17:36:39,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:39,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650795084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:39,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446807165] [2021-07-09 17:36:39,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:39,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:39,453 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) [2021-07-09 17:36:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:39,857 INFO L93 Difference]: Finished difference Result 612 states and 1801 transitions. [2021-07-09 17:36:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:39,857 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 [2021-07-09 17:36:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:39,859 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:36:39,859 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:36:39,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:36:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 348. [2021-07-09 17:36:39,864 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) [2021-07-09 17:36:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1118 transitions. [2021-07-09 17:36:39,864 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1118 transitions. Word has length 20 [2021-07-09 17:36:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:39,865 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1118 transitions. [2021-07-09 17:36:39,865 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) [2021-07-09 17:36:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1118 transitions. [2021-07-09 17:36:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:39,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:39,865 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:40,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-09 17:36:40,066 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1993579229, now seen corresponding path program 51 times [2021-07-09 17:36:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:40,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978129077] [2021-07-09 17:36:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:40,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978129077] [2021-07-09 17:36:40,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978129077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904831831] [2021-07-09 17:36:40,138 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 [2021-07-09 17:36:40,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:40,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904831831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:40,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:40,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151742316] [2021-07-09 17:36:40,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:40,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:40,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:40,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:40,377 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) [2021-07-09 17:36:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:40,604 INFO L93 Difference]: Finished difference Result 546 states and 1653 transitions. [2021-07-09 17:36:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:40,604 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 [2021-07-09 17:36:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:40,606 INFO L225 Difference]: With dead ends: 546 [2021-07-09 17:36:40,606 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:36:40,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:36:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 345. [2021-07-09 17:36:40,610 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) [2021-07-09 17:36:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-07-09 17:36:40,611 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-07-09 17:36:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:40,611 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-07-09 17:36:40,611 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) [2021-07-09 17:36:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-07-09 17:36:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:40,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:40,612 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:40,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-09 17:36:40,812 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1029782195, now seen corresponding path program 52 times [2021-07-09 17:36:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:40,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513089141] [2021-07-09 17:36:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:40,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513089141] [2021-07-09 17:36:40,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513089141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857011323] [2021-07-09 17:36:40,883 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 [2021-07-09 17:36:40,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857011323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:41,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290769608] [2021-07-09 17:36:41,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:41,087 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) [2021-07-09 17:36:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:41,642 INFO L93 Difference]: Finished difference Result 589 states and 1742 transitions. [2021-07-09 17:36:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:41,642 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 [2021-07-09 17:36:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:41,643 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:36:41,643 INFO L226 Difference]: Without dead ends: 583 [2021-07-09 17:36:41,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-07-09 17:36:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-07-09 17:36:41,652 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) [2021-07-09 17:36:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1130 transitions. [2021-07-09 17:36:41,653 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1130 transitions. Word has length 20 [2021-07-09 17:36:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:41,653 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1130 transitions. [2021-07-09 17:36:41,653 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) [2021-07-09 17:36:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1130 transitions. [2021-07-09 17:36:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:41,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:41,654 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:41,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-09 17:36:41,874 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -885641731, now seen corresponding path program 53 times [2021-07-09 17:36:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:41,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776863462] [2021-07-09 17:36:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776863462] [2021-07-09 17:36:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776863462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363022062] [2021-07-09 17:36:41,944 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 [2021-07-09 17:36:41,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363022062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:42,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:42,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035654987] [2021-07-09 17:36:42,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:42,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:42,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:42,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:42,147 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) [2021-07-09 17:36:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:42,549 INFO L93 Difference]: Finished difference Result 560 states and 1688 transitions. [2021-07-09 17:36:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:42,550 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 [2021-07-09 17:36:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:42,551 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:36:42,551 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:36:42,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:36:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 344. [2021-07-09 17:36:42,558 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) [2021-07-09 17:36:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-07-09 17:36:42,559 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-07-09 17:36:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:42,559 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-07-09 17:36:42,559 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) [2021-07-09 17:36:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-07-09 17:36:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:42,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:42,560 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:42,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,777 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -989075421, now seen corresponding path program 54 times [2021-07-09 17:36:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:42,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706888014] [2021-07-09 17:36:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:42,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706888014] [2021-07-09 17:36:42,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706888014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860477195] [2021-07-09 17:36:42,849 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 [2021-07-09 17:36:42,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860477195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:43,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386962842] [2021-07-09 17:36:43,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:43,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:43,082 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) [2021-07-09 17:36:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:43,385 INFO L93 Difference]: Finished difference Result 492 states and 1505 transitions. [2021-07-09 17:36:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:43,385 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 [2021-07-09 17:36:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:43,386 INFO L225 Difference]: With dead ends: 492 [2021-07-09 17:36:43,386 INFO L226 Difference]: Without dead ends: 480 [2021-07-09 17:36:43,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-09 17:36:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 346. [2021-07-09 17:36:43,391 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) [2021-07-09 17:36:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-07-09 17:36:43,392 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-07-09 17:36:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:43,392 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-07-09 17:36:43,392 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) [2021-07-09 17:36:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-07-09 17:36:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:43,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:43,393 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-09 17:36:43,616 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -237674983, now seen corresponding path program 55 times [2021-07-09 17:36:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912065020] [2021-07-09 17:36:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:43,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912065020] [2021-07-09 17:36:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912065020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149815524] [2021-07-09 17:36:43,691 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 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 [2021-07-09 17:36:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:43,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149815524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843043572] [2021-07-09 17:36:43,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:43,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:43,917 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) [2021-07-09 17:36:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:44,454 INFO L93 Difference]: Finished difference Result 517 states and 1557 transitions. [2021-07-09 17:36:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:44,455 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 [2021-07-09 17:36:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:44,456 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:36:44,456 INFO L226 Difference]: Without dead ends: 511 [2021-07-09 17:36:44,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-09 17:36:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 356. [2021-07-09 17:36:44,463 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) [2021-07-09 17:36:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1130 transitions. [2021-07-09 17:36:44,464 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1130 transitions. Word has length 20 [2021-07-09 17:36:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:44,465 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1130 transitions. [2021-07-09 17:36:44,465 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) [2021-07-09 17:36:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1130 transitions. [2021-07-09 17:36:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:44,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:44,466 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:44,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,688 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2141868387, now seen corresponding path program 56 times [2021-07-09 17:36:44,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:44,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145664428] [2021-07-09 17:36:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:44,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145664428] [2021-07-09 17:36:44,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145664428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59085260] [2021-07-09 17:36:44,753 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 [2021-07-09 17:36:44,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:44,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59085260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:44,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627261804] [2021-07-09 17:36:44,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:44,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:44,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:44,988 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) [2021-07-09 17:36:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:45,283 INFO L93 Difference]: Finished difference Result 488 states and 1503 transitions. [2021-07-09 17:36:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:45,284 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 [2021-07-09 17:36:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:45,285 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:36:45,286 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:36:45,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:36:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 346. [2021-07-09 17:36:45,292 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) [2021-07-09 17:36:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-07-09 17:36:45,293 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-07-09 17:36:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:45,293 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-07-09 17:36:45,293 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) [2021-07-09 17:36:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-07-09 17:36:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:45,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:45,294 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:45,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-09 17:36:45,509 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash -56954447, now seen corresponding path program 57 times [2021-07-09 17:36:45,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:45,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495806495] [2021-07-09 17:36:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:45,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:45,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495806495] [2021-07-09 17:36:45,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495806495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138394510] [2021-07-09 17:36:45,583 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 [2021-07-09 17:36:45,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138394510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449316590] [2021-07-09 17:36:45,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:45,834 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) [2021-07-09 17:36:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:46,271 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-07-09 17:36:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:46,271 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 [2021-07-09 17:36:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:46,273 INFO L225 Difference]: With dead ends: 688 [2021-07-09 17:36:46,273 INFO L226 Difference]: Without dead ends: 688 [2021-07-09 17:36:46,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-09 17:36:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 356. [2021-07-09 17:36:46,282 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) [2021-07-09 17:36:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1141 transitions. [2021-07-09 17:36:46,283 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1141 transitions. Word has length 20 [2021-07-09 17:36:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:46,283 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1141 transitions. [2021-07-09 17:36:46,283 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) [2021-07-09 17:36:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1141 transitions. [2021-07-09 17:36:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:46,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:46,284 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:46,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:46,497 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1550862169, now seen corresponding path program 58 times [2021-07-09 17:36:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:46,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369012002] [2021-07-09 17:36:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:46,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:46,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369012002] [2021-07-09 17:36:46,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369012002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421795962] [2021-07-09 17:36:46,561 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 [2021-07-09 17:36:46,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:46,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421795962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:46,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:46,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823395315] [2021-07-09 17:36:46,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:46,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:46,776 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) [2021-07-09 17:36:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:47,349 INFO L93 Difference]: Finished difference Result 694 states and 2066 transitions. [2021-07-09 17:36:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:47,349 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 [2021-07-09 17:36:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:47,351 INFO L225 Difference]: With dead ends: 694 [2021-07-09 17:36:47,351 INFO L226 Difference]: Without dead ends: 688 [2021-07-09 17:36:47,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-09 17:36:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 353. [2021-07-09 17:36:47,357 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) [2021-07-09 17:36:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1130 transitions. [2021-07-09 17:36:47,357 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1130 transitions. Word has length 20 [2021-07-09 17:36:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:47,357 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1130 transitions. [2021-07-09 17:36:47,358 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) [2021-07-09 17:36:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1130 transitions. [2021-07-09 17:36:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:47,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:47,358 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:47,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-09 17:36:47,559 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1013006591, now seen corresponding path program 59 times [2021-07-09 17:36:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:47,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176774646] [2021-07-09 17:36:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176774646] [2021-07-09 17:36:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176774646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526672761] [2021-07-09 17:36:47,625 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 [2021-07-09 17:36:47,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:47,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526672761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:47,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950344908] [2021-07-09 17:36:47,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:47,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:47,822 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) [2021-07-09 17:36:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:48,260 INFO L93 Difference]: Finished difference Result 658 states and 1984 transitions. [2021-07-09 17:36:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:48,260 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 [2021-07-09 17:36:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:48,261 INFO L225 Difference]: With dead ends: 658 [2021-07-09 17:36:48,261 INFO L226 Difference]: Without dead ends: 646 [2021-07-09 17:36:48,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-09 17:36:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 350. [2021-07-09 17:36:48,267 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) [2021-07-09 17:36:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1119 transitions. [2021-07-09 17:36:48,268 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1119 transitions. Word has length 20 [2021-07-09 17:36:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:48,268 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1119 transitions. [2021-07-09 17:36:48,268 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) [2021-07-09 17:36:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1119 transitions. [2021-07-09 17:36:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:48,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:48,269 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:48,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:48,477 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash -425261269, now seen corresponding path program 60 times [2021-07-09 17:36:48,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:48,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862118098] [2021-07-09 17:36:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:48,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862118098] [2021-07-09 17:36:48,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862118098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479627427] [2021-07-09 17:36:48,536 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 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 [2021-07-09 17:36:48,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479627427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:48,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:36:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276889671] [2021-07-09 17:36:48,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:36:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:36:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:36:48,754 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) [2021-07-09 17:36:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:49,171 INFO L93 Difference]: Finished difference Result 690 states and 2044 transitions. [2021-07-09 17:36:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:49,172 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 [2021-07-09 17:36:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:49,173 INFO L225 Difference]: With dead ends: 690 [2021-07-09 17:36:49,173 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 17:36:49,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 17:36:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 347. [2021-07-09 17:36:49,179 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) [2021-07-09 17:36:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-07-09 17:36:49,180 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-07-09 17:36:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:49,180 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-07-09 17:36:49,180 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) [2021-07-09 17:36:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-07-09 17:36:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:49,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:49,181 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:49,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-09 17:36:49,385 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2098424725, now seen corresponding path program 61 times [2021-07-09 17:36:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:49,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875139426] [2021-07-09 17:36:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:49,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875139426] [2021-07-09 17:36:49,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875139426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713818131] [2021-07-09 17:36:49,464 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 [2021-07-09 17:36:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713818131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312793446] [2021-07-09 17:36:49,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:49,732 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) [2021-07-09 17:36:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:50,145 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2021-07-09 17:36:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:50,146 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 [2021-07-09 17:36:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:50,147 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:36:50,147 INFO L226 Difference]: Without dead ends: 627 [2021-07-09 17:36:50,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-09 17:36:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 354. [2021-07-09 17:36:50,156 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) [2021-07-09 17:36:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1135 transitions. [2021-07-09 17:36:50,157 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1135 transitions. Word has length 20 [2021-07-09 17:36:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:50,157 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1135 transitions. [2021-07-09 17:36:50,158 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) [2021-07-09 17:36:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1135 transitions. [2021-07-09 17:36:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:50,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:50,158 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:50,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:50,373 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 702634849, now seen corresponding path program 62 times [2021-07-09 17:36:50,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:50,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389864856] [2021-07-09 17:36:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:50,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389864856] [2021-07-09 17:36:50,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389864856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326065603] [2021-07-09 17:36:50,457 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 [2021-07-09 17:36:50,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:50,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326065603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:50,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:50,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360002672] [2021-07-09 17:36:50,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:50,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:50,689 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) [2021-07-09 17:36:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:51,280 INFO L93 Difference]: Finished difference Result 633 states and 1905 transitions. [2021-07-09 17:36:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:51,281 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 [2021-07-09 17:36:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:51,282 INFO L225 Difference]: With dead ends: 633 [2021-07-09 17:36:51,282 INFO L226 Difference]: Without dead ends: 627 [2021-07-09 17:36:51,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-09 17:36:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 351. [2021-07-09 17:36:51,289 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) [2021-07-09 17:36:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1124 transitions. [2021-07-09 17:36:51,296 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1124 transitions. Word has length 20 [2021-07-09 17:36:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:51,296 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1124 transitions. [2021-07-09 17:36:51,297 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) [2021-07-09 17:36:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1124 transitions. [2021-07-09 17:36:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:51,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:51,298 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:51,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-07-09 17:36:51,505 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1240490427, now seen corresponding path program 63 times [2021-07-09 17:36:51,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:51,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285229595] [2021-07-09 17:36:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285229595] [2021-07-09 17:36:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285229595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094542805] [2021-07-09 17:36:51,578 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 [2021-07-09 17:36:51,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:51,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094542805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:51,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513538848] [2021-07-09 17:36:51,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:51,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:51,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:51,835 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) [2021-07-09 17:36:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:52,255 INFO L93 Difference]: Finished difference Result 597 states and 1823 transitions. [2021-07-09 17:36:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:52,255 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 [2021-07-09 17:36:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:52,256 INFO L225 Difference]: With dead ends: 597 [2021-07-09 17:36:52,256 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:36:52,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:36:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 348. [2021-07-09 17:36:52,261 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) [2021-07-09 17:36:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-07-09 17:36:52,261 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-07-09 17:36:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:52,261 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-07-09 17:36:52,261 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) [2021-07-09 17:36:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-07-09 17:36:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:52,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:52,262 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:52,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-07-09 17:36:52,463 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -279847627, now seen corresponding path program 64 times [2021-07-09 17:36:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:52,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524261121] [2021-07-09 17:36:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:52,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:52,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524261121] [2021-07-09 17:36:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524261121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010833937] [2021-07-09 17:36:52,546 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 [2021-07-09 17:36:52,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:52,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010833937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:52,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919133653] [2021-07-09 17:36:52,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:52,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:52,764 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) [2021-07-09 17:36:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:53,467 INFO L93 Difference]: Finished difference Result 702 states and 2083 transitions. [2021-07-09 17:36:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:53,467 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 [2021-07-09 17:36:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:53,468 INFO L225 Difference]: With dead ends: 702 [2021-07-09 17:36:53,468 INFO L226 Difference]: Without dead ends: 702 [2021-07-09 17:36:53,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-09 17:36:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-07-09 17:36:53,474 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) [2021-07-09 17:36:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1149 transitions. [2021-07-09 17:36:53,475 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1149 transitions. Word has length 20 [2021-07-09 17:36:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:53,475 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1149 transitions. [2021-07-09 17:36:53,475 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) [2021-07-09 17:36:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1149 transitions. [2021-07-09 17:36:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:53,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:53,476 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-07-09 17:36:53,676 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1773755349, now seen corresponding path program 65 times [2021-07-09 17:36:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:53,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644986618] [2021-07-09 17:36:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:53,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:53,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644986618] [2021-07-09 17:36:53,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644986618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956992789] [2021-07-09 17:36:53,753 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 [2021-07-09 17:36:53,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:53,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:53,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:53,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956992789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:53,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:53,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438021793] [2021-07-09 17:36:53,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:53,993 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) [2021-07-09 17:36:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:54,642 INFO L93 Difference]: Finished difference Result 708 states and 2084 transitions. [2021-07-09 17:36:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:54,642 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 [2021-07-09 17:36:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:54,643 INFO L225 Difference]: With dead ends: 708 [2021-07-09 17:36:54,643 INFO L226 Difference]: Without dead ends: 702 [2021-07-09 17:36:54,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-09 17:36:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 359. [2021-07-09 17:36:54,649 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) [2021-07-09 17:36:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1151 transitions. [2021-07-09 17:36:54,649 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1151 transitions. Word has length 20 [2021-07-09 17:36:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:54,650 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1151 transitions. [2021-07-09 17:36:54,650 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) [2021-07-09 17:36:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1151 transitions. [2021-07-09 17:36:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:54,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:54,651 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:54,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:54,851 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash 471552811, now seen corresponding path program 66 times [2021-07-09 17:36:54,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:54,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173152912] [2021-07-09 17:36:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:54,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173152912] [2021-07-09 17:36:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173152912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:54,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846088899] [2021-07-09 17:36:54,936 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 [2021-07-09 17:36:54,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846088899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:55,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:55,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903368403] [2021-07-09 17:36:55,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:55,162 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) [2021-07-09 17:36:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:55,511 INFO L93 Difference]: Finished difference Result 670 states and 2004 transitions. [2021-07-09 17:36:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:55,512 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 [2021-07-09 17:36:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:55,513 INFO L225 Difference]: With dead ends: 670 [2021-07-09 17:36:55,513 INFO L226 Difference]: Without dead ends: 670 [2021-07-09 17:36:55,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-07-09 17:36:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 352. [2021-07-09 17:36:55,518 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) [2021-07-09 17:36:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1133 transitions. [2021-07-09 17:36:55,518 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1133 transitions. Word has length 20 [2021-07-09 17:36:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:55,518 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1133 transitions. [2021-07-09 17:36:55,518 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) [2021-07-09 17:36:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1133 transitions. [2021-07-09 17:36:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:55,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:55,519 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:55,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-07-09 17:36:55,720 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:55,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1763895211, now seen corresponding path program 67 times [2021-07-09 17:36:55,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:55,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061345909] [2021-07-09 17:36:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061345909] [2021-07-09 17:36:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061345909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109240245] [2021-07-09 17:36:55,804 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 [2021-07-09 17:36:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:56,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109240245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:56,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807183630] [2021-07-09 17:36:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:56,057 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) [2021-07-09 17:36:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:56,435 INFO L93 Difference]: Finished difference Result 633 states and 1922 transitions. [2021-07-09 17:36:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:56,435 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 [2021-07-09 17:36:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:56,436 INFO L225 Difference]: With dead ends: 633 [2021-07-09 17:36:56,436 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:36:56,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:36:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 349. [2021-07-09 17:36:56,441 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) [2021-07-09 17:36:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1118 transitions. [2021-07-09 17:36:56,442 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1118 transitions. Word has length 20 [2021-07-09 17:36:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:56,442 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1118 transitions. [2021-07-09 17:36:56,442 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) [2021-07-09 17:36:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1118 transitions. [2021-07-09 17:36:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:56,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:56,443 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:56,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:56,665 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 492289339, now seen corresponding path program 68 times [2021-07-09 17:36:56,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:56,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148763779] [2021-07-09 17:36:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:56,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:56,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148763779] [2021-07-09 17:36:56,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148763779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095048569] [2021-07-09 17:36:56,747 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 [2021-07-09 17:36:56,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:56,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095048569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:57,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:57,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289954274] [2021-07-09 17:36:57,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:57,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:57,007 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) [2021-07-09 17:36:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:57,823 INFO L93 Difference]: Finished difference Result 670 states and 1996 transitions. [2021-07-09 17:36:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:57,823 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 [2021-07-09 17:36:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:57,824 INFO L225 Difference]: With dead ends: 670 [2021-07-09 17:36:57,824 INFO L226 Difference]: Without dead ends: 664 [2021-07-09 17:36:57,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-07-09 17:36:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 359. [2021-07-09 17:36:57,829 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) [2021-07-09 17:36:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1145 transitions. [2021-07-09 17:36:57,830 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1145 transitions. Word has length 20 [2021-07-09 17:36:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:57,830 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1145 transitions. [2021-07-09 17:36:57,830 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) [2021-07-09 17:36:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1145 transitions. [2021-07-09 17:36:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:57,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:57,831 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:58,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-09 17:36:58,031 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1423134587, now seen corresponding path program 69 times [2021-07-09 17:36:58,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:58,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677646245] [2021-07-09 17:36:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:58,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677646245] [2021-07-09 17:36:58,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677646245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143024232] [2021-07-09 17:36:58,103 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 [2021-07-09 17:36:58,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:58,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143024232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:58,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:58,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:58,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993833771] [2021-07-09 17:36:58,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:58,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:58,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:58,354 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) [2021-07-09 17:36:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:58,908 INFO L93 Difference]: Finished difference Result 647 states and 1957 transitions. [2021-07-09 17:36:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:58,908 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 [2021-07-09 17:36:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:58,909 INFO L225 Difference]: With dead ends: 647 [2021-07-09 17:36:58,909 INFO L226 Difference]: Without dead ends: 647 [2021-07-09 17:36:58,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-09 17:36:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 348. [2021-07-09 17:36:58,914 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) [2021-07-09 17:36:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-07-09 17:36:58,914 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-07-09 17:36:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:58,915 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-07-09 17:36:58,915 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) [2021-07-09 17:36:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-07-09 17:36:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:58,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:58,915 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:59,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-07-09 17:36:59,116 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1526568277, now seen corresponding path program 70 times [2021-07-09 17:36:59,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:59,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363013254] [2021-07-09 17:36:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:59,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363013254] [2021-07-09 17:36:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363013254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683549683] [2021-07-09 17:36:59,180 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 [2021-07-09 17:36:59,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:59,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:36:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:59,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683549683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:59,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:36:59,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402117993] [2021-07-09 17:36:59,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:59,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:59,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:59,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:59,391 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) [2021-07-09 17:36:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:59,736 INFO L93 Difference]: Finished difference Result 589 states and 1801 transitions. [2021-07-09 17:36:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:36:59,736 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 [2021-07-09 17:36:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:59,737 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:36:59,739 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 17:36:59,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 17:36:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-07-09 17:36:59,745 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) [2021-07-09 17:36:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1118 transitions. [2021-07-09 17:36:59,745 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1118 transitions. Word has length 20 [2021-07-09 17:36:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:59,745 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1118 transitions. [2021-07-09 17:36:59,745 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) [2021-07-09 17:36:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1118 transitions. [2021-07-09 17:36:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:59,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:59,746 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:59,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:59,947 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash -775167839, now seen corresponding path program 71 times [2021-07-09 17:36:59,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:59,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374117563] [2021-07-09 17:36:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:00,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374117563] [2021-07-09 17:37:00,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374117563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432404156] [2021-07-09 17:37:00,013 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 [2021-07-09 17:37:00,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:00,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:00,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432404156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:00,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659129976] [2021-07-09 17:37:00,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:00,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:00,238 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) [2021-07-09 17:37:00,844 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 17:37:00,978 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:37:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:00,987 INFO L93 Difference]: Finished difference Result 614 states and 1853 transitions. [2021-07-09 17:37:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:00,988 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 [2021-07-09 17:37:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:00,989 INFO L225 Difference]: With dead ends: 614 [2021-07-09 17:37:00,989 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 17:37:00,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 786.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 17:37:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 360. [2021-07-09 17:37:00,994 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) [2021-07-09 17:37:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1145 transitions. [2021-07-09 17:37:00,994 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1145 transitions. Word has length 20 [2021-07-09 17:37:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:00,994 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1145 transitions. [2021-07-09 17:37:00,994 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) [2021-07-09 17:37:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1145 transitions. [2021-07-09 17:37:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:00,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:00,995 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:01,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:01,196 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1604375531, now seen corresponding path program 72 times [2021-07-09 17:37:01,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:01,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401238679] [2021-07-09 17:37:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:01,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401238679] [2021-07-09 17:37:01,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401238679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607929728] [2021-07-09 17:37:01,311 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 [2021-07-09 17:37:01,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:01,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607929728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:01,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:01,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910132474] [2021-07-09 17:37:01,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:01,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:01,557 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) [2021-07-09 17:37:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:02,012 INFO L93 Difference]: Finished difference Result 585 states and 1799 transitions. [2021-07-09 17:37:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:02,013 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 [2021-07-09 17:37:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:02,014 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:37:02,014 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:37:02,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:37:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 347. [2021-07-09 17:37:02,018 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) [2021-07-09 17:37:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-07-09 17:37:02,019 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-07-09 17:37:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:02,019 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-07-09 17:37:02,019 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) [2021-07-09 17:37:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-07-09 17:37:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:02,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:02,019 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:02,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-09 17:37:02,220 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash -304735173, now seen corresponding path program 73 times [2021-07-09 17:37:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:02,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030953149] [2021-07-09 17:37:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:02,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:02,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030953149] [2021-07-09 17:37:02,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030953149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:02,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785215145] [2021-07-09 17:37:02,285 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 [2021-07-09 17:37:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:02,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785215145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:02,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:02,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:02,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085539492] [2021-07-09 17:37:02,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:02,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:02,467 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) [2021-07-09 17:37:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:02,870 INFO L93 Difference]: Finished difference Result 612 states and 1839 transitions. [2021-07-09 17:37:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:02,870 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 [2021-07-09 17:37:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:02,871 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:37:02,871 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:37:02,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:37:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 349. [2021-07-09 17:37:02,876 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) [2021-07-09 17:37:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-07-09 17:37:02,877 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-07-09 17:37:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-07-09 17:37:02,877 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) [2021-07-09 17:37:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-07-09 17:37:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:02,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:02,878 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:03,078 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1707620929, now seen corresponding path program 74 times [2021-07-09 17:37:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804715624] [2021-07-09 17:37:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:03,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804715624] [2021-07-09 17:37:03,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804715624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306899086] [2021-07-09 17:37:03,143 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 [2021-07-09 17:37:03,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306899086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:03,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275671304] [2021-07-09 17:37:03,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:03,361 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) [2021-07-09 17:37:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:03,763 INFO L93 Difference]: Finished difference Result 571 states and 1753 transitions. [2021-07-09 17:37:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:03,764 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 [2021-07-09 17:37:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:03,765 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:37:03,765 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:37:03,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:37:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-07-09 17:37:03,769 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) [2021-07-09 17:37:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1118 transitions. [2021-07-09 17:37:03,770 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1118 transitions. Word has length 20 [2021-07-09 17:37:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:03,770 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1118 transitions. [2021-07-09 17:37:03,770 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) [2021-07-09 17:37:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1118 transitions. [2021-07-09 17:37:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:03,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:03,771 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:03,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-07-09 17:37:03,971 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1835945929, now seen corresponding path program 75 times [2021-07-09 17:37:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:03,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112482133] [2021-07-09 17:37:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:04,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112482133] [2021-07-09 17:37:04,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112482133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144247965] [2021-07-09 17:37:04,038 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 [2021-07-09 17:37:04,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:04,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144247965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:04,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:04,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134723385] [2021-07-09 17:37:04,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:04,242 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) [2021-07-09 17:37:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:04,913 INFO L93 Difference]: Finished difference Result 594 states and 1798 transitions. [2021-07-09 17:37:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:04,913 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 [2021-07-09 17:37:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:04,914 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:37:04,914 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:37:04,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:37:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 361. [2021-07-09 17:37:04,919 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) [2021-07-09 17:37:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1145 transitions. [2021-07-09 17:37:04,919 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1145 transitions. Word has length 20 [2021-07-09 17:37:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:04,920 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1145 transitions. [2021-07-09 17:37:04,920 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) [2021-07-09 17:37:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1145 transitions. [2021-07-09 17:37:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:04,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:04,920 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-07-09 17:37:05,121 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash 543597441, now seen corresponding path program 76 times [2021-07-09 17:37:05,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725945306] [2021-07-09 17:37:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725945306] [2021-07-09 17:37:05,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725945306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030869986] [2021-07-09 17:37:05,186 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 [2021-07-09 17:37:05,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030869986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:05,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:05,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268480115] [2021-07-09 17:37:05,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:05,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:05,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:05,400 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) [2021-07-09 17:37:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,831 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-07-09 17:37:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:05,832 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 [2021-07-09 17:37:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,832 INFO L225 Difference]: With dead ends: 565 [2021-07-09 17:37:05,832 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 17:37:05,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 17:37:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 349. [2021-07-09 17:37:05,837 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) [2021-07-09 17:37:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-07-09 17:37:05,837 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-07-09 17:37:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,838 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-07-09 17:37:05,838 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) [2021-07-09 17:37:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-07-09 17:37:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:05,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,838 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:06,039 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,039 INFO L82 PathProgramCache]: Analyzing trace with hash -942811430, now seen corresponding path program 77 times [2021-07-09 17:37:06,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992541567] [2021-07-09 17:37:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992541567] [2021-07-09 17:37:06,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992541567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476695065] [2021-07-09 17:37:06,095 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 [2021-07-09 17:37:06,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:06,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:06,197 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 12 treesize of output 8 [2021-07-09 17:37:06,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:06,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,214 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:37:06,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:06,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:37:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476695065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:06,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:37:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722797111] [2021-07-09 17:37:06,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:06,259 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) [2021-07-09 17:37:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,451 INFO L93 Difference]: Finished difference Result 493 states and 1515 transitions. [2021-07-09 17:37:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:06,451 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 [2021-07-09 17:37:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,452 INFO L225 Difference]: With dead ends: 493 [2021-07-09 17:37:06,452 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:37:06,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:37:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 339. [2021-07-09 17:37:06,456 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) [2021-07-09 17:37:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-09 17:37:06,456 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,456 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-09 17:37:06,456 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) [2021-07-09 17:37:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-09 17:37:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:06,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,457 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:06,658 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-07-09 17:37:06,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098508915] [2021-07-09 17:37:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098508915] [2021-07-09 17:37:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098508915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601377239] [2021-07-09 17:37:06,721 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 [2021-07-09 17:37:06,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:06,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:06,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,870 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 12 treesize of output 8 [2021-07-09 17:37:06,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:06,874 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-09 17:37:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601377239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:06,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056096855] [2021-07-09 17:37:06,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:06,894 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) [2021-07-09 17:37:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,012 INFO L93 Difference]: Finished difference Result 438 states and 1322 transitions. [2021-07-09 17:37:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:07,012 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 [2021-07-09 17:37:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,013 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:37:07,013 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:37:07,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:37:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-07-09 17:37:07,017 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) [2021-07-09 17:37:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-07-09 17:37:07,017 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-07-09 17:37:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,017 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-07-09 17:37:07,017 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) [2021-07-09 17:37:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-07-09 17:37:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:07,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,018 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,219 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-07-09 17:37:07,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899606401] [2021-07-09 17:37:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899606401] [2021-07-09 17:37:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899606401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550355032] [2021-07-09 17:37:07,267 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 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 [2021-07-09 17:37:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:07,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:07,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:07,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,393 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:37:07,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:07,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-09 17:37:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550355032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:07,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:07,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551457176] [2021-07-09 17:37:07,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:07,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:07,418 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) [2021-07-09 17:37:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,547 INFO L93 Difference]: Finished difference Result 490 states and 1443 transitions. [2021-07-09 17:37:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:07,548 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 [2021-07-09 17:37:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,548 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:37:07,548 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 17:37:07,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 17:37:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-07-09 17:37:07,552 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) [2021-07-09 17:37:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1105 transitions. [2021-07-09 17:37:07,553 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1105 transitions. Word has length 20 [2021-07-09 17:37:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,553 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1105 transitions. [2021-07-09 17:37:07,553 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) [2021-07-09 17:37:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1105 transitions. [2021-07-09 17:37:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:07,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,554 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,757 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,757 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-07-09 17:37:07,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918183605] [2021-07-09 17:37:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918183605] [2021-07-09 17:37:07,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918183605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043703187] [2021-07-09 17:37:07,808 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 [2021-07-09 17:37:07,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:07,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:07,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,948 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:37:07,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:07,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-09 17:37:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043703187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:07,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608406374] [2021-07-09 17:37:07,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:07,977 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) [2021-07-09 17:37:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:08,113 INFO L93 Difference]: Finished difference Result 447 states and 1340 transitions. [2021-07-09 17:37:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:08,114 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 [2021-07-09 17:37:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:08,114 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:37:08,115 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:37:08,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:37:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 344. [2021-07-09 17:37:08,120 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) [2021-07-09 17:37:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1081 transitions. [2021-07-09 17:37:08,120 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1081 transitions. Word has length 20 [2021-07-09 17:37:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:08,121 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1081 transitions. [2021-07-09 17:37:08,121 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) [2021-07-09 17:37:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1081 transitions. [2021-07-09 17:37:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:08,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:08,121 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:08,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,325 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-07-09 17:37:08,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:08,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382001554] [2021-07-09 17:37:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:08,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382001554] [2021-07-09 17:37:08,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382001554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063696001] [2021-07-09 17:37:08,383 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 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 [2021-07-09 17:37:08,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:08,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063696001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:08,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796351579] [2021-07-09 17:37:08,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:08,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:08,579 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) [2021-07-09 17:37:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:08,754 INFO L93 Difference]: Finished difference Result 416 states and 1256 transitions. [2021-07-09 17:37:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:08,754 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 [2021-07-09 17:37:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:08,755 INFO L225 Difference]: With dead ends: 416 [2021-07-09 17:37:08,755 INFO L226 Difference]: Without dead ends: 416 [2021-07-09 17:37:08,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-09 17:37:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-07-09 17:37:08,760 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) [2021-07-09 17:37:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1103 transitions. [2021-07-09 17:37:08,761 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1103 transitions. Word has length 20 [2021-07-09 17:37:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:08,761 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1103 transitions. [2021-07-09 17:37:08,761 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) [2021-07-09 17:37:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1103 transitions. [2021-07-09 17:37:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:08,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:08,762 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:08,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,985 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-07-09 17:37:08,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:08,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299295544] [2021-07-09 17:37:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299295544] [2021-07-09 17:37:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299295544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44687128] [2021-07-09 17:37:09,036 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 [2021-07-09 17:37:09,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:09,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:09,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44687128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:09,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:09,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819155904] [2021-07-09 17:37:09,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:09,202 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) [2021-07-09 17:37:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,417 INFO L93 Difference]: Finished difference Result 422 states and 1263 transitions. [2021-07-09 17:37:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:09,417 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 [2021-07-09 17:37:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,418 INFO L225 Difference]: With dead ends: 422 [2021-07-09 17:37:09,418 INFO L226 Difference]: Without dead ends: 416 [2021-07-09 17:37:09,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-09 17:37:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-07-09 17:37:09,423 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) [2021-07-09 17:37:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1092 transitions. [2021-07-09 17:37:09,423 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1092 transitions. Word has length 20 [2021-07-09 17:37:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,423 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1092 transitions. [2021-07-09 17:37:09,423 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) [2021-07-09 17:37:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1092 transitions. [2021-07-09 17:37:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:09,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,424 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:09,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-07-09 17:37:09,625 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-07-09 17:37:09,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:09,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215409700] [2021-07-09 17:37:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215409700] [2021-07-09 17:37:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215409700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275572144] [2021-07-09 17:37:09,684 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 [2021-07-09 17:37:09,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:09,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:09,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275572144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:09,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:09,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594891512] [2021-07-09 17:37:09,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:09,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:09,850 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) [2021-07-09 17:37:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:10,052 INFO L93 Difference]: Finished difference Result 380 states and 1168 transitions. [2021-07-09 17:37:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:10,053 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 [2021-07-09 17:37:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:10,053 INFO L225 Difference]: With dead ends: 380 [2021-07-09 17:37:10,053 INFO L226 Difference]: Without dead ends: 368 [2021-07-09 17:37:10,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-09 17:37:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 339. [2021-07-09 17:37:10,057 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) [2021-07-09 17:37:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-09 17:37:10,058 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:10,058 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-09 17:37:10,058 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) [2021-07-09 17:37:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-09 17:37:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:10,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:10,059 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:10,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-07-09 17:37:10,260 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-07-09 17:37:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401079671] [2021-07-09 17:37:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:10,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401079671] [2021-07-09 17:37:10,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401079671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379948281] [2021-07-09 17:37:10,320 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 [2021-07-09 17:37:10,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:10,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:10,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:10,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:10,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,429 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 13 treesize of output 9 [2021-07-09 17:37:10,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,456 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-09 17:37:10,458 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 12 treesize of output 8 [2021-07-09 17:37:10,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:10,469 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:37:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379948281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:37:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794962282] [2021-07-09 17:37:10,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:10,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:10,532 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) [2021-07-09 17:37:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:10,772 INFO L93 Difference]: Finished difference Result 550 states and 1646 transitions. [2021-07-09 17:37:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:10,772 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 [2021-07-09 17:37:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:10,773 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:37:10,773 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:37:10,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:37:10,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-07-09 17:37:10,777 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) [2021-07-09 17:37:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-07-09 17:37:10,778 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:10,778 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-07-09 17:37:10,778 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) [2021-07-09 17:37:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-07-09 17:37:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:10,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:10,778 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:10,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-07-09 17:37:10,979 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-07-09 17:37:10,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:10,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542631580] [2021-07-09 17:37:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542631580] [2021-07-09 17:37:11,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542631580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931826777] [2021-07-09 17:37:11,039 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 [2021-07-09 17:37:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:11,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,221 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:37:11,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:11,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931826777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:11,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:11,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146684985] [2021-07-09 17:37:11,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:11,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:11,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:11,268 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) [2021-07-09 17:37:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:11,522 INFO L93 Difference]: Finished difference Result 591 states and 1730 transitions. [2021-07-09 17:37:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:11,522 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 [2021-07-09 17:37:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:11,523 INFO L225 Difference]: With dead ends: 591 [2021-07-09 17:37:11,523 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 17:37:11,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 17:37:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 351. [2021-07-09 17:37:11,528 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) [2021-07-09 17:37:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1109 transitions. [2021-07-09 17:37:11,529 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1109 transitions. Word has length 20 [2021-07-09 17:37:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:11,529 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1109 transitions. [2021-07-09 17:37:11,529 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) [2021-07-09 17:37:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1109 transitions. [2021-07-09 17:37:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:11,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:11,529 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:11,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,730 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:11,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-07-09 17:37:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469490266] [2021-07-09 17:37:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469490266] [2021-07-09 17:37:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469490266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561254313] [2021-07-09 17:37:11,787 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 [2021-07-09 17:37:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:11,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:11,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:11,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:11,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,960 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:37:11,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:11,961 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:12,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561254313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:12,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:12,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559287206] [2021-07-09 17:37:12,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:12,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:12,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:12,011 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) [2021-07-09 17:37:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,208 INFO L93 Difference]: Finished difference Result 643 states and 1851 transitions. [2021-07-09 17:37:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:12,208 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 [2021-07-09 17:37:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,209 INFO L225 Difference]: With dead ends: 643 [2021-07-09 17:37:12,209 INFO L226 Difference]: Without dead ends: 643 [2021-07-09 17:37:12,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-09 17:37:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 357. [2021-07-09 17:37:12,216 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) [2021-07-09 17:37:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1134 transitions. [2021-07-09 17:37:12,217 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1134 transitions. Word has length 20 [2021-07-09 17:37:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,217 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1134 transitions. [2021-07-09 17:37:12,217 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) [2021-07-09 17:37:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1134 transitions. [2021-07-09 17:37:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:12,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,218 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:12,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,429 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-07-09 17:37:12,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:12,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827103588] [2021-07-09 17:37:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:12,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:12,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827103588] [2021-07-09 17:37:12,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827103588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661844409] [2021-07-09 17:37:12,489 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 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 [2021-07-09 17:37:12,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:12,607 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 [2021-07-09 17:37:12,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,645 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-09 17:37:12,645 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:37:12,647 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 13 treesize of output 9 [2021-07-09 17:37:12,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,650 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 12 treesize of output 8 [2021-07-09 17:37:12,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,669 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:12,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:12,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:37:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:12,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661844409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:12,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:12,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485039503] [2021-07-09 17:37:12,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:12,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:12,720 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) [2021-07-09 17:37:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,899 INFO L93 Difference]: Finished difference Result 600 states and 1742 transitions. [2021-07-09 17:37:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:12,899 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 [2021-07-09 17:37:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,900 INFO L225 Difference]: With dead ends: 600 [2021-07-09 17:37:12,900 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:37:12,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:37:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 355. [2021-07-09 17:37:12,904 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) [2021-07-09 17:37:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1123 transitions. [2021-07-09 17:37:12,905 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1123 transitions. Word has length 20 [2021-07-09 17:37:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,905 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1123 transitions. [2021-07-09 17:37:12,905 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) [2021-07-09 17:37:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1123 transitions. [2021-07-09 17:37:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:12,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,906 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:13,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:13,106 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-07-09 17:37:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257278986] [2021-07-09 17:37:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:13,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257278986] [2021-07-09 17:37:13,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257278986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079873830] [2021-07-09 17:37:13,155 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 [2021-07-09 17:37:13,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:13,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:13,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,270 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 [2021-07-09 17:37:13,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:13,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:13,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,298 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-09 17:37:13,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:13,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-09 17:37:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079873830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:13,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:37:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634933988] [2021-07-09 17:37:13,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:13,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:13,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:13,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:13,356 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) [2021-07-09 17:37:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:13,583 INFO L93 Difference]: Finished difference Result 483 states and 1462 transitions. [2021-07-09 17:37:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:13,584 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 [2021-07-09 17:37:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:13,584 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:37:13,584 INFO L226 Difference]: Without dead ends: 421 [2021-07-09 17:37:13,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-09 17:37:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 349. [2021-07-09 17:37:13,588 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) [2021-07-09 17:37:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-07-09 17:37:13,589 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-07-09 17:37:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:13,589 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-07-09 17:37:13,589 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) [2021-07-09 17:37:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-07-09 17:37:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:13,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:13,590 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:13,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:13,793 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:13,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-07-09 17:37:13,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:13,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219597102] [2021-07-09 17:37:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:13,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219597102] [2021-07-09 17:37:13,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219597102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136266979] [2021-07-09 17:37:13,858 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 [2021-07-09 17:37:13,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:13,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:13,993 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 6 treesize of output 4 [2021-07-09 17:37:13,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,996 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 13 treesize of output 9 [2021-07-09 17:37:13,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,020 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:37:14,022 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 12 treesize of output 8 [2021-07-09 17:37:14,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:14,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:14,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136266979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:14,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:14,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009425273] [2021-07-09 17:37:14,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:14,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:14,088 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) [2021-07-09 17:37:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:14,294 INFO L93 Difference]: Finished difference Result 544 states and 1608 transitions. [2021-07-09 17:37:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:14,294 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 [2021-07-09 17:37:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:14,295 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:37:14,295 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:37:14,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:37:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 339. [2021-07-09 17:37:14,301 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) [2021-07-09 17:37:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1063 transitions. [2021-07-09 17:37:14,301 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1063 transitions. Word has length 20 [2021-07-09 17:37:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1063 transitions. [2021-07-09 17:37:14,302 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) [2021-07-09 17:37:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1063 transitions. [2021-07-09 17:37:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:14,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:14,303 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:14,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-07-09 17:37:14,505 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-07-09 17:37:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275381766] [2021-07-09 17:37:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275381766] [2021-07-09 17:37:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275381766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233074930] [2021-07-09 17:37:14,572 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 [2021-07-09 17:37:14,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:14,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:14,709 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 12 treesize of output 8 [2021-07-09 17:37:14,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:14,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,764 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-07-09 17:37:14,767 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 [2021-07-09 17:37:14,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,803 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2021-07-09 17:37:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:14,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,829 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-07-09 17:37:14,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:14,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:37:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233074930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:14,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:14,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519083186] [2021-07-09 17:37:14,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:14,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:14,912 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) [2021-07-09 17:37:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,172 INFO L93 Difference]: Finished difference Result 540 states and 1592 transitions. [2021-07-09 17:37:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:15,173 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 [2021-07-09 17:37:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,173 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:37:15,173 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:37:15,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:37:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 342. [2021-07-09 17:37:15,178 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) [2021-07-09 17:37:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1078 transitions. [2021-07-09 17:37:15,178 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1078 transitions. Word has length 20 [2021-07-09 17:37:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,178 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1078 transitions. [2021-07-09 17:37:15,179 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) [2021-07-09 17:37:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1078 transitions. [2021-07-09 17:37:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:15,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,179 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:15,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-07-09 17:37:15,380 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-07-09 17:37:15,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:15,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846103667] [2021-07-09 17:37:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846103667] [2021-07-09 17:37:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846103667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253710157] [2021-07-09 17:37:15,441 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 [2021-07-09 17:37:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:15,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:15,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,553 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 12 treesize of output 8 [2021-07-09 17:37:15,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,599 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-07-09 17:37:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:15,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,631 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-07-09 17:37:15,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:15,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,653 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:15,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:15,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-09 17:37:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253710157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:15,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964792092] [2021-07-09 17:37:15,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:15,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:15,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:15,723 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) [2021-07-09 17:37:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,920 INFO L93 Difference]: Finished difference Result 478 states and 1449 transitions. [2021-07-09 17:37:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:15,921 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 [2021-07-09 17:37:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,921 INFO L225 Difference]: With dead ends: 478 [2021-07-09 17:37:15,921 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 17:37:15,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 17:37:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 333. [2021-07-09 17:37:15,925 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) [2021-07-09 17:37:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1039 transitions. [2021-07-09 17:37:15,926 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1039 transitions. Word has length 20 [2021-07-09 17:37:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,926 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1039 transitions. [2021-07-09 17:37:15,926 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) [2021-07-09 17:37:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1039 transitions. [2021-07-09 17:37:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:15,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,927 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:16,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable966 [2021-07-09 17:37:16,127 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-07-09 17:37:16,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:16,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999707948] [2021-07-09 17:37:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999707948] [2021-07-09 17:37:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999707948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795142976] [2021-07-09 17:37:16,187 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 [2021-07-09 17:37:16,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:16,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,337 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-07-09 17:37:16,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:16,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:16,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,374 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:16,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:16,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-07-09 17:37:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795142976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:16,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559634932] [2021-07-09 17:37:16,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:16,453 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) [2021-07-09 17:37:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:16,664 INFO L93 Difference]: Finished difference Result 588 states and 1733 transitions. [2021-07-09 17:37:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:16,664 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 [2021-07-09 17:37:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:16,665 INFO L225 Difference]: With dead ends: 588 [2021-07-09 17:37:16,665 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:37:16,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:37:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 341. [2021-07-09 17:37:16,670 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) [2021-07-09 17:37:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1075 transitions. [2021-07-09 17:37:16,670 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1075 transitions. Word has length 20 [2021-07-09 17:37:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:16,670 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1075 transitions. [2021-07-09 17:37:16,670 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) [2021-07-09 17:37:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1075 transitions. [2021-07-09 17:37:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:16,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:16,671 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:16,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:16,872 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-07-09 17:37:16,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:16,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173835391] [2021-07-09 17:37:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173835391] [2021-07-09 17:37:16,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173835391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977798057] [2021-07-09 17:37:16,929 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 [2021-07-09 17:37:16,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:17,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,093 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-09 17:37:17,095 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 [2021-07-09 17:37:17,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:17,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,117 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:17,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:17,118 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-09 17:37:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977798057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:17,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:17,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977880297] [2021-07-09 17:37:17,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:17,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:17,196 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) [2021-07-09 17:37:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:17,401 INFO L93 Difference]: Finished difference Result 574 states and 1682 transitions. [2021-07-09 17:37:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:17,402 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 [2021-07-09 17:37:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:17,402 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:37:17,402 INFO L226 Difference]: Without dead ends: 568 [2021-07-09 17:37:17,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-09 17:37:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-07-09 17:37:17,409 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) [2021-07-09 17:37:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1077 transitions. [2021-07-09 17:37:17,409 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1077 transitions. Word has length 20 [2021-07-09 17:37:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:17,409 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1077 transitions. [2021-07-09 17:37:17,409 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) [2021-07-09 17:37:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1077 transitions. [2021-07-09 17:37:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:17,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:17,410 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:17,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:17,611 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-07-09 17:37:17,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:17,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597892868] [2021-07-09 17:37:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597892868] [2021-07-09 17:37:17,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597892868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326473451] [2021-07-09 17:37:17,675 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 [2021-07-09 17:37:17,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:17,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:17,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:17,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,788 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 [2021-07-09 17:37:17,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,827 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-09 17:37:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:17,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,847 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 13 treesize of output 9 [2021-07-09 17:37:17,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,880 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:37:17,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:17,881 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:37:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326473451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:17,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:17,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395159171] [2021-07-09 17:37:17,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:17,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:17,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:17,964 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) [2021-07-09 17:37:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:18,294 INFO L93 Difference]: Finished difference Result 619 states and 1797 transitions. [2021-07-09 17:37:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:18,295 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 [2021-07-09 17:37:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:18,295 INFO L225 Difference]: With dead ends: 619 [2021-07-09 17:37:18,296 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 17:37:18,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 17:37:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 337. [2021-07-09 17:37:18,300 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) [2021-07-09 17:37:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1059 transitions. [2021-07-09 17:37:18,301 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1059 transitions. Word has length 20 [2021-07-09 17:37:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:18,301 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1059 transitions. [2021-07-09 17:37:18,301 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) [2021-07-09 17:37:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1059 transitions. [2021-07-09 17:37:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:18,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:18,301 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:18,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-09 17:37:18,502 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-07-09 17:37:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:18,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586879902] [2021-07-09 17:37:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:18,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586879902] [2021-07-09 17:37:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586879902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717272478] [2021-07-09 17:37:18,592 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 [2021-07-09 17:37:18,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:18,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:18,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,764 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-09 17:37:18,767 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 [2021-07-09 17:37:18,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:18,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,791 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:18,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:18,792 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-09 17:37:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717272478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:18,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036206802] [2021-07-09 17:37:18,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:18,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:18,882 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) [2021-07-09 17:37:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:19,110 INFO L93 Difference]: Finished difference Result 553 states and 1649 transitions. [2021-07-09 17:37:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:19,110 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 [2021-07-09 17:37:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:19,111 INFO L225 Difference]: With dead ends: 553 [2021-07-09 17:37:19,111 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:37:19,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:37:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 334. [2021-07-09 17:37:19,116 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) [2021-07-09 17:37:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1044 transitions. [2021-07-09 17:37:19,116 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1044 transitions. Word has length 20 [2021-07-09 17:37:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:19,116 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1044 transitions. [2021-07-09 17:37:19,116 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) [2021-07-09 17:37:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1044 transitions. [2021-07-09 17:37:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:19,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:19,117 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:19,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-07-09 17:37:19,318 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-07-09 17:37:19,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:19,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691810551] [2021-07-09 17:37:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691810551] [2021-07-09 17:37:19,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691810551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108135989] [2021-07-09 17:37:19,377 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 [2021-07-09 17:37:19,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:19,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:19,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,487 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 13 treesize of output 9 [2021-07-09 17:37:19,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,512 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-09 17:37:19,514 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 [2021-07-09 17:37:19,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:19,525 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-09 17:37:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108135989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:19,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038066578] [2021-07-09 17:37:19,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:19,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:19,604 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) [2021-07-09 17:37:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:19,859 INFO L93 Difference]: Finished difference Result 525 states and 1551 transitions. [2021-07-09 17:37:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:19,859 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 [2021-07-09 17:37:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:19,860 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:37:19,860 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 17:37:19,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 17:37:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 344. [2021-07-09 17:37:19,864 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) [2021-07-09 17:37:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1071 transitions. [2021-07-09 17:37:19,865 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1071 transitions. Word has length 20 [2021-07-09 17:37:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:19,865 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1071 transitions. [2021-07-09 17:37:19,865 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) [2021-07-09 17:37:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1071 transitions. [2021-07-09 17:37:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:19,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:19,865 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:20,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:20,088 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-07-09 17:37:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466752858] [2021-07-09 17:37:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466752858] [2021-07-09 17:37:20,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466752858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843767859] [2021-07-09 17:37:20,146 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 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 [2021-07-09 17:37:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:20,252 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 [2021-07-09 17:37:20,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,255 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 13 treesize of output 9 [2021-07-09 17:37:20,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,281 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-07-09 17:37:20,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:20,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:20,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:20,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:37:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843767859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:20,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:20,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558255903] [2021-07-09 17:37:20,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:20,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:20,379 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) [2021-07-09 17:37:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,580 INFO L93 Difference]: Finished difference Result 496 states and 1497 transitions. [2021-07-09 17:37:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:20,581 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 [2021-07-09 17:37:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,581 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:37:20,581 INFO L226 Difference]: Without dead ends: 496 [2021-07-09 17:37:20,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-09 17:37:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 331. [2021-07-09 17:37:20,586 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) [2021-07-09 17:37:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1031 transitions. [2021-07-09 17:37:20,586 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1031 transitions. Word has length 20 [2021-07-09 17:37:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,587 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1031 transitions. [2021-07-09 17:37:20,587 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) [2021-07-09 17:37:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1031 transitions. [2021-07-09 17:37:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:20,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,587 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:20,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-07-09 17:37:20,797 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-07-09 17:37:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380063684] [2021-07-09 17:37:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380063684] [2021-07-09 17:37:20,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380063684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055324298] [2021-07-09 17:37:20,863 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 [2021-07-09 17:37:20,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055324298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:21,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056898559] [2021-07-09 17:37:21,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:21,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:21,062 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) [2021-07-09 17:37:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:21,300 INFO L93 Difference]: Finished difference Result 417 states and 1251 transitions. [2021-07-09 17:37:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:21,301 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 [2021-07-09 17:37:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:21,301 INFO L225 Difference]: With dead ends: 417 [2021-07-09 17:37:21,302 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 17:37:21,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 17:37:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 338. [2021-07-09 17:37:21,313 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) [2021-07-09 17:37:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1058 transitions. [2021-07-09 17:37:21,314 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1058 transitions. Word has length 20 [2021-07-09 17:37:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:21,314 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1058 transitions. [2021-07-09 17:37:21,315 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) [2021-07-09 17:37:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1058 transitions. [2021-07-09 17:37:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:21,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:21,315 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-07-09 17:37:21,529 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-07-09 17:37:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688675648] [2021-07-09 17:37:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:21,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688675648] [2021-07-09 17:37:21,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688675648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429221409] [2021-07-09 17:37:21,586 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 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 [2021-07-09 17:37:21,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429221409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018650520] [2021-07-09 17:37:21,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:21,825 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) [2021-07-09 17:37:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,145 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-07-09 17:37:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:22,145 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 [2021-07-09 17:37:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,146 INFO L225 Difference]: With dead ends: 423 [2021-07-09 17:37:22,146 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 17:37:22,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 17:37:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 335. [2021-07-09 17:37:22,149 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) [2021-07-09 17:37:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1047 transitions. [2021-07-09 17:37:22,150 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1047 transitions. Word has length 20 [2021-07-09 17:37:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,150 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1047 transitions. [2021-07-09 17:37:22,150 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) [2021-07-09 17:37:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1047 transitions. [2021-07-09 17:37:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:22,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,151 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:22,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,352 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-07-09 17:37:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:22,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720502710] [2021-07-09 17:37:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720502710] [2021-07-09 17:37:22,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720502710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486558831] [2021-07-09 17:37:22,439 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 [2021-07-09 17:37:22,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486558831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:22,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873072091] [2021-07-09 17:37:22,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:22,653 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) [2021-07-09 17:37:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,917 INFO L93 Difference]: Finished difference Result 387 states and 1176 transitions. [2021-07-09 17:37:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:22,917 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 [2021-07-09 17:37:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,918 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:37:22,918 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 17:37:22,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 17:37:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 332. [2021-07-09 17:37:22,921 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) [2021-07-09 17:37:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-07-09 17:37:22,922 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-07-09 17:37:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,922 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-07-09 17:37:22,922 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) [2021-07-09 17:37:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-07-09 17:37:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:22,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,923 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:23,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:23,124 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-07-09 17:37:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:23,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237398603] [2021-07-09 17:37:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237398603] [2021-07-09 17:37:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237398603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973671778] [2021-07-09 17:37:23,188 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 [2021-07-09 17:37:23,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:23,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973671778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:23,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846583326] [2021-07-09 17:37:23,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:23,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:23,382 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) [2021-07-09 17:37:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:23,655 INFO L93 Difference]: Finished difference Result 501 states and 1461 transitions. [2021-07-09 17:37:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:23,655 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 [2021-07-09 17:37:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:23,656 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:37:23,656 INFO L226 Difference]: Without dead ends: 501 [2021-07-09 17:37:23,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-09 17:37:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 340. [2021-07-09 17:37:23,660 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) [2021-07-09 17:37:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1072 transitions. [2021-07-09 17:37:23,665 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1072 transitions. Word has length 20 [2021-07-09 17:37:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:23,665 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1072 transitions. [2021-07-09 17:37:23,665 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) [2021-07-09 17:37:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1072 transitions. [2021-07-09 17:37:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:23,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:23,666 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:23,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:23,886 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-07-09 17:37:23,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:23,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586899349] [2021-07-09 17:37:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586899349] [2021-07-09 17:37:23,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586899349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161617269] [2021-07-09 17:37:23,954 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 [2021-07-09 17:37:24,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:24,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161617269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:24,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:24,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402897711] [2021-07-09 17:37:24,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:24,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:24,181 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) [2021-07-09 17:37:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,487 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-07-09 17:37:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:24,488 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 [2021-07-09 17:37:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,488 INFO L225 Difference]: With dead ends: 507 [2021-07-09 17:37:24,488 INFO L226 Difference]: Without dead ends: 501 [2021-07-09 17:37:24,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-09 17:37:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 343. [2021-07-09 17:37:24,493 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) [2021-07-09 17:37:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1074 transitions. [2021-07-09 17:37:24,494 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1074 transitions. Word has length 20 [2021-07-09 17:37:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,494 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1074 transitions. [2021-07-09 17:37:24,494 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) [2021-07-09 17:37:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1074 transitions. [2021-07-09 17:37:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:24,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,494 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,695 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-07-09 17:37:24,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543067352] [2021-07-09 17:37:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543067352] [2021-07-09 17:37:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543067352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933085372] [2021-07-09 17:37:24,765 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 [2021-07-09 17:37:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933085372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724164675] [2021-07-09 17:37:24,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:24,947 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) [2021-07-09 17:37:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:25,210 INFO L93 Difference]: Finished difference Result 498 states and 1448 transitions. [2021-07-09 17:37:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:25,211 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 [2021-07-09 17:37:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:25,211 INFO L225 Difference]: With dead ends: 498 [2021-07-09 17:37:25,211 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:37:25,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:37:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 336. [2021-07-09 17:37:25,215 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) [2021-07-09 17:37:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1056 transitions. [2021-07-09 17:37:25,216 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1056 transitions. Word has length 20 [2021-07-09 17:37:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:25,216 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1056 transitions. [2021-07-09 17:37:25,216 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) [2021-07-09 17:37:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1056 transitions. [2021-07-09 17:37:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:25,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:25,217 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:25,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-07-09 17:37:25,417 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-07-09 17:37:25,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:25,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966320762] [2021-07-09 17:37:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:25,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966320762] [2021-07-09 17:37:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966320762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964421089] [2021-07-09 17:37:25,481 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 [2021-07-09 17:37:25,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:25,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964421089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:25,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:25,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273375031] [2021-07-09 17:37:25,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:25,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:25,676 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) [2021-07-09 17:37:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:25,894 INFO L93 Difference]: Finished difference Result 432 states and 1300 transitions. [2021-07-09 17:37:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:25,895 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 [2021-07-09 17:37:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:25,895 INFO L225 Difference]: With dead ends: 432 [2021-07-09 17:37:25,895 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 17:37:25,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 17:37:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 333. [2021-07-09 17:37:25,899 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) [2021-07-09 17:37:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1041 transitions. [2021-07-09 17:37:25,900 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1041 transitions. Word has length 20 [2021-07-09 17:37:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:25,900 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1041 transitions. [2021-07-09 17:37:25,900 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) [2021-07-09 17:37:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1041 transitions. [2021-07-09 17:37:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:25,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:25,900 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,101 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-07-09 17:37:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697400196] [2021-07-09 17:37:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697400196] [2021-07-09 17:37:26,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697400196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305774257] [2021-07-09 17:37:26,160 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 [2021-07-09 17:37:26,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:26,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305774257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:26,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333945070] [2021-07-09 17:37:26,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:26,341 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) [2021-07-09 17:37:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,732 INFO L93 Difference]: Finished difference Result 475 states and 1389 transitions. [2021-07-09 17:37:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:26,732 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 [2021-07-09 17:37:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,733 INFO L225 Difference]: With dead ends: 475 [2021-07-09 17:37:26,733 INFO L226 Difference]: Without dead ends: 469 [2021-07-09 17:37:26,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-09 17:37:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-07-09 17:37:26,737 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) [2021-07-09 17:37:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-07-09 17:37:26,737 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,737 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-07-09 17:37:26,737 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) [2021-07-09 17:37:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-07-09 17:37:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:26,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,938 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-07-09 17:37:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139050781] [2021-07-09 17:37:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139050781] [2021-07-09 17:37:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139050781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214063473] [2021-07-09 17:37:27,005 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 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 [2021-07-09 17:37:27,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214063473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559932640] [2021-07-09 17:37:27,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:27,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:27,188 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) [2021-07-09 17:37:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:27,495 INFO L93 Difference]: Finished difference Result 446 states and 1335 transitions. [2021-07-09 17:37:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:27,496 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 [2021-07-09 17:37:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:27,496 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:37:27,497 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:37:27,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:37:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-07-09 17:37:27,500 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) [2021-07-09 17:37:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-07-09 17:37:27,501 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-07-09 17:37:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-07-09 17:37:27,501 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) [2021-07-09 17:37:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-07-09 17:37:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:27,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:27,501 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:27,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:27,702 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-07-09 17:37:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:27,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308189122] [2021-07-09 17:37:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:27,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308189122] [2021-07-09 17:37:27,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308189122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670766979] [2021-07-09 17:37:27,756 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 [2021-07-09 17:37:27,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670766979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:27,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515784472] [2021-07-09 17:37:27,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:27,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:27,935 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) [2021-07-09 17:37:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:28,234 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-07-09 17:37:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:28,235 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 [2021-07-09 17:37:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:28,235 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:37:28,235 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:37:28,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:37:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 334. [2021-07-09 17:37:28,240 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) [2021-07-09 17:37:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-07-09 17:37:28,241 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-07-09 17:37:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:28,241 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-07-09 17:37:28,241 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) [2021-07-09 17:37:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-07-09 17:37:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:28,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:28,242 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:28,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-07-09 17:37:28,457 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-07-09 17:37:28,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:28,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851354626] [2021-07-09 17:37:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:28,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851354626] [2021-07-09 17:37:28,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851354626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581251468] [2021-07-09 17:37:28,520 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 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 [2021-07-09 17:37:28,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:28,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581251468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:28,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:28,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317458994] [2021-07-09 17:37:28,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:28,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:28,706 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) [2021-07-09 17:37:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:28,967 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-07-09 17:37:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:28,968 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 [2021-07-09 17:37:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:28,968 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:37:28,968 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:37:28,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:37:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 344. [2021-07-09 17:37:28,972 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) [2021-07-09 17:37:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-07-09 17:37:28,972 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:28,972 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-07-09 17:37:28,973 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) [2021-07-09 17:37:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-07-09 17:37:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:28,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:28,973 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:29,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-07-09 17:37:29,174 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-07-09 17:37:29,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:29,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968124309] [2021-07-09 17:37:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968124309] [2021-07-09 17:37:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968124309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157923477] [2021-07-09 17:37:29,239 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 [2021-07-09 17:37:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:29,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157923477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:29,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427555516] [2021-07-09 17:37:29,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:29,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:29,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:29,446 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) [2021-07-09 17:37:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,684 INFO L93 Difference]: Finished difference Result 374 states and 1150 transitions. [2021-07-09 17:37:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:29,685 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 [2021-07-09 17:37:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,685 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:37:29,685 INFO L226 Difference]: Without dead ends: 374 [2021-07-09 17:37:29,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-09 17:37:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 329. [2021-07-09 17:37:29,689 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) [2021-07-09 17:37:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1023 transitions. [2021-07-09 17:37:29,689 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1023 transitions. Word has length 20 [2021-07-09 17:37:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,689 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1023 transitions. [2021-07-09 17:37:29,689 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) [2021-07-09 17:37:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1023 transitions. [2021-07-09 17:37:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:29,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,690 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:29,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-07-09 17:37:29,890 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 657164802, now seen corresponding path program 110 times [2021-07-09 17:37:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:29,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819544825] [2021-07-09 17:37:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:29,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819544825] [2021-07-09 17:37:29,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819544825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984689468] [2021-07-09 17:37:29,950 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 [2021-07-09 17:37:30,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,070 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 12 treesize of output 8 [2021-07-09 17:37:30,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:30,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:30,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,110 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-07-09 17:37:30,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:30,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,135 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-09 17:37:30,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:30,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-07-09 17:37:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984689468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:30,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:37:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172360947] [2021-07-09 17:37:30,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:30,198 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) [2021-07-09 17:37:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:30,514 INFO L93 Difference]: Finished difference Result 421 states and 1257 transitions. [2021-07-09 17:37:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:30,514 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 [2021-07-09 17:37:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:30,515 INFO L225 Difference]: With dead ends: 421 [2021-07-09 17:37:30,515 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:37:30,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:37:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2021-07-09 17:37:30,518 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) [2021-07-09 17:37:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 963 transitions. [2021-07-09 17:37:30,518 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 963 transitions. Word has length 20 [2021-07-09 17:37:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:30,519 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 963 transitions. [2021-07-09 17:37:30,519 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) [2021-07-09 17:37:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 963 transitions. [2021-07-09 17:37:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:30,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:30,519 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,720 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-07-09 17:37:30,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366972055] [2021-07-09 17:37:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366972055] [2021-07-09 17:37:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366972055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260084003] [2021-07-09 17:37:30,780 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 [2021-07-09 17:37:30,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:30,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:30,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,886 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 13 treesize of output 9 [2021-07-09 17:37:30,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,921 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-07-09 17:37:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:30,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,941 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 6 treesize of output 4 [2021-07-09 17:37:30,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,961 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-09 17:37:30,962 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:37:30,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:30,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-09 17:37:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260084003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147450635] [2021-07-09 17:37:31,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:31,004 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) [2021-07-09 17:37:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,166 INFO L93 Difference]: Finished difference Result 488 states and 1442 transitions. [2021-07-09 17:37:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:31,167 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 [2021-07-09 17:37:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,167 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:37:31,167 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:37:31,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:37:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-07-09 17:37:31,171 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) [2021-07-09 17:37:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1020 transitions. [2021-07-09 17:37:31,172 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1020 transitions. Word has length 20 [2021-07-09 17:37:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,172 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1020 transitions. [2021-07-09 17:37:31,172 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) [2021-07-09 17:37:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1020 transitions. [2021-07-09 17:37:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:31,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,172 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:31,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:31,373 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-07-09 17:37:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:31,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322383564] [2021-07-09 17:37:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322383564] [2021-07-09 17:37:31,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322383564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131201631] [2021-07-09 17:37:31,429 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 [2021-07-09 17:37:31,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:31,540 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 6 treesize of output 4 [2021-07-09 17:37:31,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,543 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 13 treesize of output 9 [2021-07-09 17:37:31,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,569 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:37:31,572 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 12 treesize of output 8 [2021-07-09 17:37:31,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:31,583 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131201631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648314798] [2021-07-09 17:37:31,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:31,628 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) [2021-07-09 17:37:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,842 INFO L93 Difference]: Finished difference Result 540 states and 1563 transitions. [2021-07-09 17:37:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:31,842 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 [2021-07-09 17:37:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,843 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:37:31,843 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:37:31,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:37:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 335. [2021-07-09 17:37:31,847 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) [2021-07-09 17:37:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-09 17:37:31,848 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-09 17:37:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,848 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-09 17:37:31,848 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) [2021-07-09 17:37:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-09 17:37:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:31,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,848 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,050 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-07-09 17:37:32,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788072171] [2021-07-09 17:37:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:32,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788072171] [2021-07-09 17:37:32,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788072171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561206561] [2021-07-09 17:37:32,104 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 [2021-07-09 17:37:32,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:32,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,204 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 5 treesize of output 3 [2021-07-09 17:37:32,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,247 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-07-09 17:37:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:32,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,283 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:37:32,283 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-07-09 17:37:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:32,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:32,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,319 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:32,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:32,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:37:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561206561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:32,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:32,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873601679] [2021-07-09 17:37:32,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:32,364 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) [2021-07-09 17:37:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:32,522 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2021-07-09 17:37:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:32,523 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 [2021-07-09 17:37:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:32,523 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:37:32,523 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:37:32,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:37:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2021-07-09 17:37:32,527 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) [2021-07-09 17:37:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-07-09 17:37:32,527 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-07-09 17:37:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:32,528 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-07-09 17:37:32,528 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) [2021-07-09 17:37:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-07-09 17:37:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:32,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:32,528 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,742 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 114 times [2021-07-09 17:37:32,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701969867] [2021-07-09 17:37:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701969867] [2021-07-09 17:37:32,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701969867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801327557] [2021-07-09 17:37:32,803 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 [2021-07-09 17:37:32,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,911 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 5 treesize of output 3 [2021-07-09 17:37:32,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:32,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:32,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:32,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,961 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 17:37:32,961 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-07-09 17:37:32,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:32,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801327557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:33,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:37:33,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897501187] [2021-07-09 17:37:33,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:33,017 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) [2021-07-09 17:37:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,171 INFO L93 Difference]: Finished difference Result 600 states and 1752 transitions. [2021-07-09 17:37:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:33,171 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 [2021-07-09 17:37:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,172 INFO L225 Difference]: With dead ends: 600 [2021-07-09 17:37:33,172 INFO L226 Difference]: Without dead ends: 600 [2021-07-09 17:37:33,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-09 17:37:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 339. [2021-07-09 17:37:33,176 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) [2021-07-09 17:37:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1058 transitions. [2021-07-09 17:37:33,177 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1058 transitions. Word has length 20 [2021-07-09 17:37:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,177 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1058 transitions. [2021-07-09 17:37:33,177 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) [2021-07-09 17:37:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1058 transitions. [2021-07-09 17:37:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:33,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,178 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:33,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,378 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 115 times [2021-07-09 17:37:33,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:33,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147613243] [2021-07-09 17:37:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147613243] [2021-07-09 17:37:33,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147613243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781103938] [2021-07-09 17:37:33,442 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 [2021-07-09 17:37:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:33,553 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 6 treesize of output 4 [2021-07-09 17:37:33,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,587 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:37:33,587 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-07-09 17:37:33,589 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 [2021-07-09 17:37:33,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:33,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,611 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:33,611 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-07-09 17:37:33,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:33,612 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:37:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781103938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:33,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319273287] [2021-07-09 17:37:33,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:33,691 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) [2021-07-09 17:37:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,870 INFO L93 Difference]: Finished difference Result 567 states and 1670 transitions. [2021-07-09 17:37:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:33,871 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 [2021-07-09 17:37:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,872 INFO L225 Difference]: With dead ends: 567 [2021-07-09 17:37:33,872 INFO L226 Difference]: Without dead ends: 567 [2021-07-09 17:37:33,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-09 17:37:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 342. [2021-07-09 17:37:33,876 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) [2021-07-09 17:37:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1073 transitions. [2021-07-09 17:37:33,876 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1073 transitions. Word has length 20 [2021-07-09 17:37:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,876 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1073 transitions. [2021-07-09 17:37:33,877 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) [2021-07-09 17:37:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1073 transitions. [2021-07-09 17:37:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:33,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,877 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:34,078 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 116 times [2021-07-09 17:37:34,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267909290] [2021-07-09 17:37:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:34,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267909290] [2021-07-09 17:37:34,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267909290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290406276] [2021-07-09 17:37:34,133 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 [2021-07-09 17:37:34,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:34,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:34,230 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 12 treesize of output 8 [2021-07-09 17:37:34,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,232 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 [2021-07-09 17:37:34,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,272 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-07-09 17:37:34,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:34,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,277 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 13 treesize of output 9 [2021-07-09 17:37:34,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,299 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:37:34,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:34,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-07-09 17:37:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290406276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:34,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639087522] [2021-07-09 17:37:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:34,367 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) [2021-07-09 17:37:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:34,528 INFO L93 Difference]: Finished difference Result 534 states and 1593 transitions. [2021-07-09 17:37:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:34,529 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 [2021-07-09 17:37:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:34,530 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:37:34,530 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:37:34,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:37:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 333. [2021-07-09 17:37:34,535 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) [2021-07-09 17:37:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-07-09 17:37:34,536 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-07-09 17:37:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:34,536 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-07-09 17:37:34,536 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) [2021-07-09 17:37:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-07-09 17:37:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:34,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:34,536 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-07-09 17:37:34,737 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 117 times [2021-07-09 17:37:34,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328500814] [2021-07-09 17:37:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:34,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328500814] [2021-07-09 17:37:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328500814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703700696] [2021-07-09 17:37:34,794 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 [2021-07-09 17:37:34,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:34,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:34,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,880 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 [2021-07-09 17:37:34,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,905 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:37:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:34,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:34,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:34,918 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703700696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264540184] [2021-07-09 17:37:35,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:35,004 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) [2021-07-09 17:37:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:35,233 INFO L93 Difference]: Finished difference Result 613 states and 1774 transitions. [2021-07-09 17:37:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:35,233 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 [2021-07-09 17:37:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:35,234 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:37:35,234 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 17:37:35,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 17:37:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 341. [2021-07-09 17:37:35,239 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) [2021-07-09 17:37:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1070 transitions. [2021-07-09 17:37:35,239 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1070 transitions. Word has length 20 [2021-07-09 17:37:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:35,239 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1070 transitions. [2021-07-09 17:37:35,239 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) [2021-07-09 17:37:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1070 transitions. [2021-07-09 17:37:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:35,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:35,240 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,441 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 118 times [2021-07-09 17:37:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:35,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340558427] [2021-07-09 17:37:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340558427] [2021-07-09 17:37:35,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340558427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403115591] [2021-07-09 17:37:35,501 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 [2021-07-09 17:37:35,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:35,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:35,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:35,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,686 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:37:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:35,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:35,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,713 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:35,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:35,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403115591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:35,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108912512] [2021-07-09 17:37:35,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:35,800 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) [2021-07-09 17:37:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,031 INFO L93 Difference]: Finished difference Result 599 states and 1723 transitions. [2021-07-09 17:37:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:36,031 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 [2021-07-09 17:37:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,032 INFO L225 Difference]: With dead ends: 599 [2021-07-09 17:37:36,032 INFO L226 Difference]: Without dead ends: 593 [2021-07-09 17:37:36,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-09 17:37:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-07-09 17:37:36,038 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) [2021-07-09 17:37:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-09 17:37:36,039 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-09 17:37:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,039 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-09 17:37:36,039 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) [2021-07-09 17:37:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-09 17:37:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:36,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,040 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,261 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 119 times [2021-07-09 17:37:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318631606] [2021-07-09 17:37:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318631606] [2021-07-09 17:37:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318631606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203801997] [2021-07-09 17:37:36,326 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 [2021-07-09 17:37:36,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:36,416 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 13 treesize of output 9 [2021-07-09 17:37:36,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,419 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 12 treesize of output 8 [2021-07-09 17:37:36,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,459 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-07-09 17:37:36,461 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 6 treesize of output 4 [2021-07-09 17:37:36,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,483 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-09 17:37:36,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-07-09 17:37:36,483 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:37:36,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:36,484 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:37:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203801997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:36,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513170062] [2021-07-09 17:37:36,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:36,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:36,565 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) [2021-07-09 17:37:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,763 INFO L93 Difference]: Finished difference Result 624 states and 1812 transitions. [2021-07-09 17:37:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:36,764 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 [2021-07-09 17:37:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,765 INFO L225 Difference]: With dead ends: 624 [2021-07-09 17:37:36,765 INFO L226 Difference]: Without dead ends: 624 [2021-07-09 17:37:36,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-09 17:37:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 338. [2021-07-09 17:37:36,769 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) [2021-07-09 17:37:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1060 transitions. [2021-07-09 17:37:36,770 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1060 transitions. Word has length 20 [2021-07-09 17:37:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,770 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1060 transitions. [2021-07-09 17:37:36,770 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) [2021-07-09 17:37:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1060 transitions. [2021-07-09 17:37:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:36,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,770 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,971 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 120 times [2021-07-09 17:37:36,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073275753] [2021-07-09 17:37:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073275753] [2021-07-09 17:37:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073275753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83408931] [2021-07-09 17:37:37,035 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 [2021-07-09 17:37:37,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:37,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,133 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 5 treesize of output 3 [2021-07-09 17:37:37,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,176 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-07-09 17:37:37,179 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 [2021-07-09 17:37:37,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,212 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:37:37,214 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 12 treesize of output 8 [2021-07-09 17:37:37,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:37,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,236 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:37,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-07-09 17:37:37,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:37,236 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:37:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83408931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:37,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656473763] [2021-07-09 17:37:37,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:37,314 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) [2021-07-09 17:37:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:37,511 INFO L93 Difference]: Finished difference Result 593 states and 1745 transitions. [2021-07-09 17:37:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:37,511 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 [2021-07-09 17:37:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:37,512 INFO L225 Difference]: With dead ends: 593 [2021-07-09 17:37:37,512 INFO L226 Difference]: Without dead ends: 593 [2021-07-09 17:37:37,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-09 17:37:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-07-09 17:37:37,516 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) [2021-07-09 17:37:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-07-09 17:37:37,517 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-07-09 17:37:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:37,517 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-07-09 17:37:37,517 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) [2021-07-09 17:37:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-07-09 17:37:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:37,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:37,518 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:37,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,718 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 121 times [2021-07-09 17:37:37,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:37,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812523648] [2021-07-09 17:37:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812523648] [2021-07-09 17:37:37,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812523648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861171869] [2021-07-09 17:37:37,779 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 [2021-07-09 17:37:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:37,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,899 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-09 17:37:37,900 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-07-09 17:37:37,902 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 12 treesize of output 8 [2021-07-09 17:37:37,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:37,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,924 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:37:37,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:37,925 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:37:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861171869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:38,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:38,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647787670] [2021-07-09 17:37:38,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:38,002 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) [2021-07-09 17:37:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,200 INFO L93 Difference]: Finished difference Result 547 states and 1592 transitions. [2021-07-09 17:37:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:38,200 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 [2021-07-09 17:37:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,201 INFO L225 Difference]: With dead ends: 547 [2021-07-09 17:37:38,201 INFO L226 Difference]: Without dead ends: 541 [2021-07-09 17:37:38,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-07-09 17:37:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 339. [2021-07-09 17:37:38,205 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) [2021-07-09 17:37:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1059 transitions. [2021-07-09 17:37:38,205 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1059 transitions. Word has length 20 [2021-07-09 17:37:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,205 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1059 transitions. [2021-07-09 17:37:38,205 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) [2021-07-09 17:37:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1059 transitions. [2021-07-09 17:37:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:38,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,206 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,406 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 122 times [2021-07-09 17:37:38,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612336987] [2021-07-09 17:37:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612336987] [2021-07-09 17:37:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612336987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125331499] [2021-07-09 17:37:38,462 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 [2021-07-09 17:37:38,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:38,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,559 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 12 treesize of output 8 [2021-07-09 17:37:38,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,604 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-07-09 17:37:38,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-07-09 17:37:38,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:38,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,609 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 13 treesize of output 9 [2021-07-09 17:37:38,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,631 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:37:38,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:38,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-07-09 17:37:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125331499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:38,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:38,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130990015] [2021-07-09 17:37:38,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:38,707 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) [2021-07-09 17:37:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,877 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-07-09 17:37:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:38,877 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 [2021-07-09 17:37:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,878 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:37:38,878 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:37:38,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:37:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 334. [2021-07-09 17:37:38,882 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) [2021-07-09 17:37:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-07-09 17:37:38,882 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-07-09 17:37:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,882 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-07-09 17:37:38,882 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) [2021-07-09 17:37:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-07-09 17:37:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:38,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,883 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:39,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,084 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 123 times [2021-07-09 17:37:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:39,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122995173] [2021-07-09 17:37:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122995173] [2021-07-09 17:37:39,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122995173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682729821] [2021-07-09 17:37:39,153 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 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 [2021-07-09 17:37:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:39,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,264 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 [2021-07-09 17:37:39,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,279 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:37:39,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:39,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:37:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682729821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:39,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245471224] [2021-07-09 17:37:39,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:39,308 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) [2021-07-09 17:37:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:39,464 INFO L93 Difference]: Finished difference Result 483 states and 1452 transitions. [2021-07-09 17:37:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:39,464 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 [2021-07-09 17:37:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:39,465 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:37:39,465 INFO L226 Difference]: Without dead ends: 483 [2021-07-09 17:37:39,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-09 17:37:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-07-09 17:37:39,468 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) [2021-07-09 17:37:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1047 transitions. [2021-07-09 17:37:39,469 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1047 transitions. Word has length 20 [2021-07-09 17:37:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:39,469 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1047 transitions. [2021-07-09 17:37:39,469 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) [2021-07-09 17:37:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1047 transitions. [2021-07-09 17:37:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:39,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:39,470 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:39,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1309 [2021-07-09 17:37:39,670 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 124 times [2021-07-09 17:37:39,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:39,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991408887] [2021-07-09 17:37:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991408887] [2021-07-09 17:37:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991408887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253679289] [2021-07-09 17:37:39,725 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 [2021-07-09 17:37:39,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:37:39,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,808 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 13 treesize of output 9 [2021-07-09 17:37:39,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,823 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:37:39,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:39,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:37:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253679289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:39,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728315977] [2021-07-09 17:37:39,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:39,883 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) [2021-07-09 17:37:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,074 INFO L93 Difference]: Finished difference Result 487 states and 1444 transitions. [2021-07-09 17:37:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:40,074 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 [2021-07-09 17:37:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,075 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:37:40,075 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:37:40,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:37:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 336. [2021-07-09 17:37:40,079 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) [2021-07-09 17:37:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1042 transitions. [2021-07-09 17:37:40,079 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1042 transitions. Word has length 20 [2021-07-09 17:37:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,079 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1042 transitions. [2021-07-09 17:37:40,079 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) [2021-07-09 17:37:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1042 transitions. [2021-07-09 17:37:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:40,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,080 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1315,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,281 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 125 times [2021-07-09 17:37:40,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261971735] [2021-07-09 17:37:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261971735] [2021-07-09 17:37:40,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261971735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046859176] [2021-07-09 17:37:40,346 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 [2021-07-09 17:37:40,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:40,433 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 12 treesize of output 8 [2021-07-09 17:37:40,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,435 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 13 treesize of output 9 [2021-07-09 17:37:40,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,450 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:37:40,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:40,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:37:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046859176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:40,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:40,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348550080] [2021-07-09 17:37:40,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:40,501 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) [2021-07-09 17:37:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,619 INFO L93 Difference]: Finished difference Result 444 states and 1347 transitions. [2021-07-09 17:37:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:40,619 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 [2021-07-09 17:37:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,620 INFO L225 Difference]: With dead ends: 444 [2021-07-09 17:37:40,620 INFO L226 Difference]: Without dead ends: 444 [2021-07-09 17:37:40,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-09 17:37:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 319. [2021-07-09 17:37:40,624 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) [2021-07-09 17:37:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 981 transitions. [2021-07-09 17:37:40,625 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 981 transitions. Word has length 20 [2021-07-09 17:37:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,625 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 981 transitions. [2021-07-09 17:37:40,625 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) [2021-07-09 17:37:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 981 transitions. [2021-07-09 17:37:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:40,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,626 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-07-09 17:37:40,829 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 126 times [2021-07-09 17:37:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117742275] [2021-07-09 17:37:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117742275] [2021-07-09 17:37:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117742275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625796441] [2021-07-09 17:37:40,905 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 [2021-07-09 17:37:40,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625796441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138797269] [2021-07-09 17:37:41,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:41,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:41,064 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) [2021-07-09 17:37:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,220 INFO L93 Difference]: Finished difference Result 397 states and 1189 transitions. [2021-07-09 17:37:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:41,220 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 [2021-07-09 17:37:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,221 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:37:41,221 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:37:41,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:37:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 325. [2021-07-09 17:37:41,225 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) [2021-07-09 17:37:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1008 transitions. [2021-07-09 17:37:41,225 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1008 transitions. Word has length 20 [2021-07-09 17:37:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,225 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 1008 transitions. [2021-07-09 17:37:41,225 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) [2021-07-09 17:37:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1008 transitions. [2021-07-09 17:37:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:41,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,226 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-07-09 17:37:41,426 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 127 times [2021-07-09 17:37:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148594805] [2021-07-09 17:37:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:41,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148594805] [2021-07-09 17:37:41,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148594805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091177016] [2021-07-09 17:37:41,483 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 [2021-07-09 17:37:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091177016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:41,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450217923] [2021-07-09 17:37:41,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:41,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:41,613 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) [2021-07-09 17:37:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,766 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-07-09 17:37:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:41,767 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 [2021-07-09 17:37:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,767 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:37:41,767 INFO L226 Difference]: Without dead ends: 403 [2021-07-09 17:37:41,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-09 17:37:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-07-09 17:37:41,771 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) [2021-07-09 17:37:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 993 transitions. [2021-07-09 17:37:41,771 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 993 transitions. Word has length 20 [2021-07-09 17:37:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,771 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 993 transitions. [2021-07-09 17:37:41,771 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) [2021-07-09 17:37:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 993 transitions. [2021-07-09 17:37:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:41,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,772 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-07-09 17:37:41,980 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 128 times [2021-07-09 17:37:41,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173296119] [2021-07-09 17:37:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173296119] [2021-07-09 17:37:42,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173296119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274042380] [2021-07-09 17:37:42,037 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 [2021-07-09 17:37:42,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274042380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:42,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:37:42,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965358667] [2021-07-09 17:37:42,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:42,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:42,149 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) [2021-07-09 17:37:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:42,282 INFO L93 Difference]: Finished difference Result 361 states and 1097 transitions. [2021-07-09 17:37:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:42,283 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 [2021-07-09 17:37:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:42,283 INFO L225 Difference]: With dead ends: 361 [2021-07-09 17:37:42,283 INFO L226 Difference]: Without dead ends: 361 [2021-07-09 17:37:42,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-09 17:37:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2021-07-09 17:37:42,286 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) [2021-07-09 17:37:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1008 transitions. [2021-07-09 17:37:42,287 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1008 transitions. Word has length 20 [2021-07-09 17:37:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:42,287 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 1008 transitions. [2021-07-09 17:37:42,287 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) [2021-07-09 17:37:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1008 transitions. [2021-07-09 17:37:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:42,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:42,287 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:42,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1342,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,488 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:42,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 129 times [2021-07-09 17:37:42,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:42,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848595209] [2021-07-09 17:37:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848595209] [2021-07-09 17:37:42,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848595209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790027639] [2021-07-09 17:37:42,551 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 [2021-07-09 17:37:42,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:42,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790027639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:42,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766225334] [2021-07-09 17:37:42,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:42,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:42,720 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) [2021-07-09 17:37:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:42,879 INFO L93 Difference]: Finished difference Result 483 states and 1424 transitions. [2021-07-09 17:37:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:42,879 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 [2021-07-09 17:37:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:42,880 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:37:42,880 INFO L226 Difference]: Without dead ends: 483 [2021-07-09 17:37:42,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-09 17:37:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 338. [2021-07-09 17:37:42,884 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) [2021-07-09 17:37:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-07-09 17:37:42,885 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-07-09 17:37:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:42,885 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-07-09 17:37:42,885 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) [2021-07-09 17:37:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-07-09 17:37:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:42,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:42,885 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:43,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-07-09 17:37:43,090 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 130 times [2021-07-09 17:37:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:43,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718127517] [2021-07-09 17:37:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718127517] [2021-07-09 17:37:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718127517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121312824] [2021-07-09 17:37:43,150 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 [2021-07-09 17:37:43,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121312824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:43,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817673952] [2021-07-09 17:37:43,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:43,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:43,311 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) [2021-07-09 17:37:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:43,480 INFO L93 Difference]: Finished difference Result 469 states and 1373 transitions. [2021-07-09 17:37:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:43,480 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 [2021-07-09 17:37:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:43,481 INFO L225 Difference]: With dead ends: 469 [2021-07-09 17:37:43,481 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:37:43,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:37:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-07-09 17:37:43,484 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) [2021-07-09 17:37:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-07-09 17:37:43,485 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-07-09 17:37:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:43,485 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-07-09 17:37:43,485 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) [2021-07-09 17:37:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-07-09 17:37:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:43,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:43,486 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:43,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-07-09 17:37:43,689 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 131 times [2021-07-09 17:37:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96617620] [2021-07-09 17:37:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96617620] [2021-07-09 17:37:43,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96617620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429314575] [2021-07-09 17:37:43,763 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 [2021-07-09 17:37:43,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:43,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429314575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:43,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750014407] [2021-07-09 17:37:43,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:43,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:43,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:43,970 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) [2021-07-09 17:37:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,139 INFO L93 Difference]: Finished difference Result 540 states and 1571 transitions. [2021-07-09 17:37:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:44,139 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 [2021-07-09 17:37:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,140 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:37:44,140 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:37:44,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:37:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-07-09 17:37:44,144 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) [2021-07-09 17:37:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-07-09 17:37:44,145 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-07-09 17:37:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,145 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-07-09 17:37:44,145 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) [2021-07-09 17:37:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-07-09 17:37:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:44,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,346 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 132 times [2021-07-09 17:37:44,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125047763] [2021-07-09 17:37:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125047763] [2021-07-09 17:37:44,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125047763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442023451] [2021-07-09 17:37:44,409 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 [2021-07-09 17:37:44,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:44,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442023451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:44,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:44,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980632227] [2021-07-09 17:37:44,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:44,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:44,579 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) [2021-07-09 17:37:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,728 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2021-07-09 17:37:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:44,729 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 [2021-07-09 17:37:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,730 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:37:44,730 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:37:44,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:37:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-07-09 17:37:44,734 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) [2021-07-09 17:37:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-07-09 17:37:44,734 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-07-09 17:37:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,734 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-07-09 17:37:44,734 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) [2021-07-09 17:37:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-07-09 17:37:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:44,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,735 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1369,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,935 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 133 times [2021-07-09 17:37:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485801033] [2021-07-09 17:37:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485801033] [2021-07-09 17:37:44,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485801033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959821976] [2021-07-09 17:37:44,994 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 [2021-07-09 17:37:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959821976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:45,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510015673] [2021-07-09 17:37:45,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:45,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:45,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:45,177 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) [2021-07-09 17:37:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:45,351 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-07-09 17:37:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:45,351 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 [2021-07-09 17:37:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:45,352 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:37:45,352 INFO L226 Difference]: Without dead ends: 500 [2021-07-09 17:37:45,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-09 17:37:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 345. [2021-07-09 17:37:45,356 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) [2021-07-09 17:37:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1069 transitions. [2021-07-09 17:37:45,357 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1069 transitions. Word has length 20 [2021-07-09 17:37:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:45,357 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1069 transitions. [2021-07-09 17:37:45,357 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) [2021-07-09 17:37:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1069 transitions. [2021-07-09 17:37:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:45,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:45,357 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-07-09 17:37:45,558 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 134 times [2021-07-09 17:37:45,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742704729] [2021-07-09 17:37:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742704729] [2021-07-09 17:37:45,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742704729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894361953] [2021-07-09 17:37:45,619 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 [2021-07-09 17:37:45,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:45,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894361953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:45,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524095744] [2021-07-09 17:37:45,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:45,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:45,795 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) [2021-07-09 17:37:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,048 INFO L93 Difference]: Finished difference Result 512 states and 1473 transitions. [2021-07-09 17:37:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:46,048 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 [2021-07-09 17:37:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,049 INFO L225 Difference]: With dead ends: 512 [2021-07-09 17:37:46,049 INFO L226 Difference]: Without dead ends: 512 [2021-07-09 17:37:46,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-09 17:37:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 342. [2021-07-09 17:37:46,053 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) [2021-07-09 17:37:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1059 transitions. [2021-07-09 17:37:46,054 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1059 transitions. Word has length 20 [2021-07-09 17:37:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:46,054 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1059 transitions. [2021-07-09 17:37:46,054 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) [2021-07-09 17:37:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1059 transitions. [2021-07-09 17:37:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:46,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:46,054 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:46,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-07-09 17:37:46,255 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 135 times [2021-07-09 17:37:46,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:46,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401952624] [2021-07-09 17:37:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:46,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:46,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401952624] [2021-07-09 17:37:46,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401952624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124088896] [2021-07-09 17:37:46,320 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 [2021-07-09 17:37:46,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:46,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124088896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120042002] [2021-07-09 17:37:46,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:46,510 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) [2021-07-09 17:37:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,753 INFO L93 Difference]: Finished difference Result 445 states and 1330 transitions. [2021-07-09 17:37:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:46,753 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 [2021-07-09 17:37:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,754 INFO L225 Difference]: With dead ends: 445 [2021-07-09 17:37:46,754 INFO L226 Difference]: Without dead ends: 445 [2021-07-09 17:37:46,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-09 17:37:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 343. [2021-07-09 17:37:46,758 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) [2021-07-09 17:37:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-07-09 17:37:46,758 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-07-09 17:37:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:46,758 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-07-09 17:37:46,758 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) [2021-07-09 17:37:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-07-09 17:37:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:46,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:46,759 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:46,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-07-09 17:37:46,960 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 136 times [2021-07-09 17:37:46,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:46,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956217307] [2021-07-09 17:37:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956217307] [2021-07-09 17:37:47,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956217307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496364170] [2021-07-09 17:37:47,024 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 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 [2021-07-09 17:37:47,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:47,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496364170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095396759] [2021-07-09 17:37:47,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:47,194 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) [2021-07-09 17:37:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,395 INFO L93 Difference]: Finished difference Result 439 states and 1312 transitions. [2021-07-09 17:37:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:47,395 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 [2021-07-09 17:37:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,396 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:37:47,396 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:37:47,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:37:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 332. [2021-07-09 17:37:47,400 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) [2021-07-09 17:37:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1024 transitions. [2021-07-09 17:37:47,400 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1024 transitions. Word has length 20 [2021-07-09 17:37:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,400 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1024 transitions. [2021-07-09 17:37:47,400 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) [2021-07-09 17:37:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1024 transitions. [2021-07-09 17:37:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:47,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,401 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:47,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-07-09 17:37:47,601 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 137 times [2021-07-09 17:37:47,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:47,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645859236] [2021-07-09 17:37:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645859236] [2021-07-09 17:37:47,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645859236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232663314] [2021-07-09 17:37:47,668 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 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 [2021-07-09 17:37:47,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232663314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769819674] [2021-07-09 17:37:47,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:47,869 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) [2021-07-09 17:37:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:48,071 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-07-09 17:37:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:48,071 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 [2021-07-09 17:37:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:48,072 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:37:48,072 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:37:48,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:37:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2021-07-09 17:37:48,075 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) [2021-07-09 17:37:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1012 transitions. [2021-07-09 17:37:48,076 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1012 transitions. Word has length 20 [2021-07-09 17:37:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:48,076 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1012 transitions. [2021-07-09 17:37:48,076 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) [2021-07-09 17:37:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1012 transitions. [2021-07-09 17:37:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:48,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:48,076 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,277 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 138 times [2021-07-09 17:37:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677577073] [2021-07-09 17:37:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677577073] [2021-07-09 17:37:48,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677577073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891630123] [2021-07-09 17:37:48,343 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 [2021-07-09 17:37:48,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891630123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:48,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939540372] [2021-07-09 17:37:48,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:48,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:48,521 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) [2021-07-09 17:37:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:48,703 INFO L93 Difference]: Finished difference Result 407 states and 1195 transitions. [2021-07-09 17:37:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:48,703 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 [2021-07-09 17:37:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:48,704 INFO L225 Difference]: With dead ends: 407 [2021-07-09 17:37:48,704 INFO L226 Difference]: Without dead ends: 401 [2021-07-09 17:37:48,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-09 17:37:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2021-07-09 17:37:48,707 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) [2021-07-09 17:37:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2021-07-09 17:37:48,708 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2021-07-09 17:37:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:48,708 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2021-07-09 17:37:48,708 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) [2021-07-09 17:37:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2021-07-09 17:37:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:48,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:48,709 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1412,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,909 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 139 times [2021-07-09 17:37:48,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671113896] [2021-07-09 17:37:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671113896] [2021-07-09 17:37:48,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671113896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430253921] [2021-07-09 17:37:48,968 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 [2021-07-09 17:37:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430253921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:49,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:49,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914334352] [2021-07-09 17:37:49,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:49,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:49,149 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) [2021-07-09 17:37:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,375 INFO L93 Difference]: Finished difference Result 413 states and 1216 transitions. [2021-07-09 17:37:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:49,376 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 [2021-07-09 17:37:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,376 INFO L225 Difference]: With dead ends: 413 [2021-07-09 17:37:49,376 INFO L226 Difference]: Without dead ends: 413 [2021-07-09 17:37:49,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-09 17:37:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 341. [2021-07-09 17:37:49,380 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) [2021-07-09 17:37:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-07-09 17:37:49,380 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-07-09 17:37:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,380 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-07-09 17:37:49,380 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) [2021-07-09 17:37:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-07-09 17:37:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:49,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,381 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,582 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 140 times [2021-07-09 17:37:49,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141864498] [2021-07-09 17:37:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141864498] [2021-07-09 17:37:49,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141864498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96599735] [2021-07-09 17:37:49,643 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 [2021-07-09 17:37:49,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:49,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96599735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:49,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:37:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435210338] [2021-07-09 17:37:49,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:49,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:49,807 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) [2021-07-09 17:37:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,993 INFO L93 Difference]: Finished difference Result 382 states and 1151 transitions. [2021-07-09 17:37:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:49,993 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 [2021-07-09 17:37:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,994 INFO L225 Difference]: With dead ends: 382 [2021-07-09 17:37:49,994 INFO L226 Difference]: Without dead ends: 382 [2021-07-09 17:37:49,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-09 17:37:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2021-07-09 17:37:49,997 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) [2021-07-09 17:37:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1017 transitions. [2021-07-09 17:37:49,998 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1017 transitions. Word has length 20 [2021-07-09 17:37:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,998 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1017 transitions. [2021-07-09 17:37:49,998 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) [2021-07-09 17:37:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1017 transitions. [2021-07-09 17:37:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:49,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,998 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:50,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-07-09 17:37:50,199 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 141 times [2021-07-09 17:37:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851876451] [2021-07-09 17:37:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:50,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851876451] [2021-07-09 17:37:50,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851876451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722461187] [2021-07-09 17:37:50,277 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 [2021-07-09 17:37:50,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:50,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722461187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:50,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944475012] [2021-07-09 17:37:50,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:50,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:50,475 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) [2021-07-09 17:37:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:50,681 INFO L93 Difference]: Finished difference Result 406 states and 1204 transitions. [2021-07-09 17:37:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:50,681 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 [2021-07-09 17:37:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:50,682 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:37:50,682 INFO L226 Difference]: Without dead ends: 406 [2021-07-09 17:37:50,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-09 17:37:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 339. [2021-07-09 17:37:50,685 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) [2021-07-09 17:37:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1048 transitions. [2021-07-09 17:37:50,686 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1048 transitions. Word has length 20 [2021-07-09 17:37:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:50,686 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1048 transitions. [2021-07-09 17:37:50,686 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) [2021-07-09 17:37:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1048 transitions. [2021-07-09 17:37:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:50,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:50,687 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:50,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-07-09 17:37:50,888 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 142 times [2021-07-09 17:37:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:50,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298888225] [2021-07-09 17:37:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298888225] [2021-07-09 17:37:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298888225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262823573] [2021-07-09 17:37:50,946 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 [2021-07-09 17:37:50,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262823573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422950178] [2021-07-09 17:37:51,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:51,139 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) [2021-07-09 17:37:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:51,335 INFO L93 Difference]: Finished difference Result 412 states and 1211 transitions. [2021-07-09 17:37:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:51,335 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 [2021-07-09 17:37:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:51,336 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:37:51,336 INFO L226 Difference]: Without dead ends: 406 [2021-07-09 17:37:51,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-09 17:37:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 336. [2021-07-09 17:37:51,339 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) [2021-07-09 17:37:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-07-09 17:37:51,339 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-07-09 17:37:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:51,340 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-07-09 17:37:51,340 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) [2021-07-09 17:37:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-07-09 17:37:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:51,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:51,340 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:51,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-07-09 17:37:51,541 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 143 times [2021-07-09 17:37:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:51,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027871374] [2021-07-09 17:37:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027871374] [2021-07-09 17:37:51,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027871374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144423158] [2021-07-09 17:37:51,597 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 [2021-07-09 17:37:51,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144423158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:51,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728475621] [2021-07-09 17:37:51,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:51,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:51,783 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) [2021-07-09 17:37:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:52,005 INFO L93 Difference]: Finished difference Result 376 states and 1129 transitions. [2021-07-09 17:37:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:52,006 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 [2021-07-09 17:37:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:52,007 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:37:52,007 INFO L226 Difference]: Without dead ends: 364 [2021-07-09 17:37:52,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-09 17:37:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 333. [2021-07-09 17:37:52,010 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) [2021-07-09 17:37:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-07-09 17:37:52,010 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-07-09 17:37:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:52,010 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-07-09 17:37:52,010 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) [2021-07-09 17:37:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-07-09 17:37:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:52,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:52,011 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-07-09 17:37:52,211 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 144 times [2021-07-09 17:37:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623469142] [2021-07-09 17:37:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:52,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623469142] [2021-07-09 17:37:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623469142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514896664] [2021-07-09 17:37:52,288 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 [2021-07-09 17:37:52,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:52,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514896664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:52,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:52,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896132275] [2021-07-09 17:37:52,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:52,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:52,466 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) [2021-07-09 17:37:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:52,707 INFO L93 Difference]: Finished difference Result 493 states and 1422 transitions. [2021-07-09 17:37:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:52,708 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 [2021-07-09 17:37:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:52,709 INFO L225 Difference]: With dead ends: 493 [2021-07-09 17:37:52,709 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:37:52,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:37:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 341. [2021-07-09 17:37:52,713 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) [2021-07-09 17:37:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1062 transitions. [2021-07-09 17:37:52,714 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1062 transitions. Word has length 20 [2021-07-09 17:37:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:52,714 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1062 transitions. [2021-07-09 17:37:52,714 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) [2021-07-09 17:37:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1062 transitions. [2021-07-09 17:37:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:52,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:52,715 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-07-09 17:37:52,915 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 145 times [2021-07-09 17:37:52,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706775292] [2021-07-09 17:37:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:52,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706775292] [2021-07-09 17:37:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706775292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428065108] [2021-07-09 17:37:52,990 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 [2021-07-09 17:37:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428065108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534947079] [2021-07-09 17:37:53,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:53,202 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) [2021-07-09 17:37:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:53,446 INFO L93 Difference]: Finished difference Result 499 states and 1423 transitions. [2021-07-09 17:37:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:53,446 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 [2021-07-09 17:37:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:53,447 INFO L225 Difference]: With dead ends: 499 [2021-07-09 17:37:53,447 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:37:53,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:37:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 344. [2021-07-09 17:37:53,451 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) [2021-07-09 17:37:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1064 transitions. [2021-07-09 17:37:53,452 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1064 transitions. Word has length 20 [2021-07-09 17:37:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:53,452 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1064 transitions. [2021-07-09 17:37:53,452 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) [2021-07-09 17:37:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1064 transitions. [2021-07-09 17:37:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:53,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:53,452 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:53,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-07-09 17:37:53,653 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 146 times [2021-07-09 17:37:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:53,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045743278] [2021-07-09 17:37:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:53,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045743278] [2021-07-09 17:37:53,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045743278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392384949] [2021-07-09 17:37:53,718 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 [2021-07-09 17:37:53,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392384949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:53,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688782521] [2021-07-09 17:37:53,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:53,975 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) [2021-07-09 17:37:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,147 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-07-09 17:37:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:54,147 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 [2021-07-09 17:37:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,148 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:37:54,148 INFO L226 Difference]: Without dead ends: 461 [2021-07-09 17:37:54,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-09 17:37:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2021-07-09 17:37:54,151 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) [2021-07-09 17:37:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1046 transitions. [2021-07-09 17:37:54,152 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1046 transitions. Word has length 20 [2021-07-09 17:37:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,152 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1046 transitions. [2021-07-09 17:37:54,152 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) [2021-07-09 17:37:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1046 transitions. [2021-07-09 17:37:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:54,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,152 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-07-09 17:37:54,353 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 147 times [2021-07-09 17:37:54,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844994515] [2021-07-09 17:37:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:54,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:54,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844994515] [2021-07-09 17:37:54,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844994515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558242821] [2021-07-09 17:37:54,416 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 [2021-07-09 17:37:54,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558242821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:54,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:54,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869427467] [2021-07-09 17:37:54,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:54,638 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) [2021-07-09 17:37:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,768 INFO L93 Difference]: Finished difference Result 424 states and 1261 transitions. [2021-07-09 17:37:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:54,768 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 [2021-07-09 17:37:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,769 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:37:54,769 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:37:54,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:37:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 334. [2021-07-09 17:37:54,772 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) [2021-07-09 17:37:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1031 transitions. [2021-07-09 17:37:54,773 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1031 transitions. Word has length 20 [2021-07-09 17:37:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,773 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1031 transitions. [2021-07-09 17:37:54,773 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) [2021-07-09 17:37:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1031 transitions. [2021-07-09 17:37:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:54,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,774 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-07-09 17:37:54,974 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 148 times [2021-07-09 17:37:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640579675] [2021-07-09 17:37:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640579675] [2021-07-09 17:37:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640579675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575089653] [2021-07-09 17:37:55,043 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 [2021-07-09 17:37:55,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:55,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575089653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479578391] [2021-07-09 17:37:55,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:55,262 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) [2021-07-09 17:37:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:55,509 INFO L93 Difference]: Finished difference Result 461 states and 1335 transitions. [2021-07-09 17:37:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:55,509 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 [2021-07-09 17:37:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:55,510 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:37:55,510 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:37:55,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:37:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 344. [2021-07-09 17:37:55,513 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) [2021-07-09 17:37:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1058 transitions. [2021-07-09 17:37:55,514 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1058 transitions. Word has length 20 [2021-07-09 17:37:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:55,514 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1058 transitions. [2021-07-09 17:37:55,514 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) [2021-07-09 17:37:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1058 transitions. [2021-07-09 17:37:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:55,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:55,515 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:55,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-07-09 17:37:55,717 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 149 times [2021-07-09 17:37:55,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:55,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068030665] [2021-07-09 17:37:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068030665] [2021-07-09 17:37:55,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068030665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086272079] [2021-07-09 17:37:55,778 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 [2021-07-09 17:37:55,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086272079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720317456] [2021-07-09 17:37:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:55,953 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) [2021-07-09 17:37:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:56,213 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2021-07-09 17:37:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:56,213 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 [2021-07-09 17:37:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:56,214 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:37:56,214 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:37:56,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:37:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 333. [2021-07-09 17:37:56,218 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) [2021-07-09 17:37:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-07-09 17:37:56,218 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-07-09 17:37:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:56,218 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-07-09 17:37:56,218 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) [2021-07-09 17:37:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-07-09 17:37:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:56,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:56,219 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-07-09 17:37:56,419 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 150 times [2021-07-09 17:37:56,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315215601] [2021-07-09 17:37:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315215601] [2021-07-09 17:37:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315215601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046164199] [2021-07-09 17:37:56,480 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 [2021-07-09 17:37:56,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046164199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:56,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:56,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979087816] [2021-07-09 17:37:56,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:56,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:56,685 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) [2021-07-09 17:37:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:56,888 INFO L93 Difference]: Finished difference Result 378 states and 1133 transitions. [2021-07-09 17:37:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:56,888 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 [2021-07-09 17:37:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:56,889 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:37:56,889 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:37:56,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:37:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2021-07-09 17:37:56,892 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) [2021-07-09 17:37:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-07-09 17:37:56,893 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-07-09 17:37:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:56,893 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-07-09 17:37:56,893 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) [2021-07-09 17:37:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-07-09 17:37:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:56,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:56,893 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:57,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,094 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 151 times [2021-07-09 17:37:57,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:57,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080052395] [2021-07-09 17:37:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:57,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080052395] [2021-07-09 17:37:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080052395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427807395] [2021-07-09 17:37:57,151 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 [2021-07-09 17:37:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427807395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:57,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:57,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358411618] [2021-07-09 17:37:57,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:57,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:57,338 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) [2021-07-09 17:37:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:57,566 INFO L93 Difference]: Finished difference Result 403 states and 1185 transitions. [2021-07-09 17:37:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:57,567 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 [2021-07-09 17:37:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:57,567 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:37:57,568 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:37:57,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:37:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 345. [2021-07-09 17:37:57,571 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) [2021-07-09 17:37:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1058 transitions. [2021-07-09 17:37:57,571 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1058 transitions. Word has length 20 [2021-07-09 17:37:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1058 transitions. [2021-07-09 17:37:57,572 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) [2021-07-09 17:37:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1058 transitions. [2021-07-09 17:37:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:57,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:57,572 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:57,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,774 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 152 times [2021-07-09 17:37:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:57,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502171426] [2021-07-09 17:37:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502171426] [2021-07-09 17:37:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502171426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331845986] [2021-07-09 17:37:57,833 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 [2021-07-09 17:37:57,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:57,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:57,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331845986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:58,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:58,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866365206] [2021-07-09 17:37:58,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:58,034 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) [2021-07-09 17:37:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,211 INFO L93 Difference]: Finished difference Result 374 states and 1131 transitions. [2021-07-09 17:37:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:58,212 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 [2021-07-09 17:37:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,212 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:37:58,212 INFO L226 Difference]: Without dead ends: 374 [2021-07-09 17:37:58,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-09 17:37:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-07-09 17:37:58,216 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) [2021-07-09 17:37:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-07-09 17:37:58,216 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-07-09 17:37:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,216 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-07-09 17:37:58,216 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) [2021-07-09 17:37:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-07-09 17:37:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:58,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,217 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-07-09 17:37:58,417 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 153 times [2021-07-09 17:37:58,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666350862] [2021-07-09 17:37:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666350862] [2021-07-09 17:37:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666350862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734385232] [2021-07-09 17:37:58,480 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 [2021-07-09 17:37:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734385232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:58,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:58,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433737654] [2021-07-09 17:37:58,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:58,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:58,643 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) [2021-07-09 17:37:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,818 INFO L93 Difference]: Finished difference Result 451 states and 1333 transitions. [2021-07-09 17:37:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:58,818 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 [2021-07-09 17:37:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,819 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:37:58,819 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:37:58,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:37:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 342. [2021-07-09 17:37:58,822 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) [2021-07-09 17:37:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1066 transitions. [2021-07-09 17:37:58,823 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1066 transitions. Word has length 20 [2021-07-09 17:37:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,823 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1066 transitions. [2021-07-09 17:37:58,823 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) [2021-07-09 17:37:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1066 transitions. [2021-07-09 17:37:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:58,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,824 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:59,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1563,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,024 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 154 times [2021-07-09 17:37:59,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:59,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524247139] [2021-07-09 17:37:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524247139] [2021-07-09 17:37:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524247139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357709604] [2021-07-09 17:37:59,085 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 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 [2021-07-09 17:37:59,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357709604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283118292] [2021-07-09 17:37:59,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:59,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:59,243 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) [2021-07-09 17:37:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:59,432 INFO L93 Difference]: Finished difference Result 457 states and 1334 transitions. [2021-07-09 17:37:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:59,432 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 [2021-07-09 17:37:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:59,433 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:37:59,433 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:37:59,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:37:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 345. [2021-07-09 17:37:59,437 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) [2021-07-09 17:37:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-09 17:37:59,437 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-09 17:37:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:59,437 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-09 17:37:59,437 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) [2021-07-09 17:37:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-09 17:37:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:59,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:59,438 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:59,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-07-09 17:37:59,638 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 155 times [2021-07-09 17:37:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:59,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519267555] [2021-07-09 17:37:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:59,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519267555] [2021-07-09 17:37:59,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519267555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873790244] [2021-07-09 17:37:59,705 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 [2021-07-09 17:37:59,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873790244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:37:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261122345] [2021-07-09 17:37:59,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:59,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:59,889 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) [2021-07-09 17:38:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,052 INFO L93 Difference]: Finished difference Result 509 states and 1476 transitions. [2021-07-09 17:38:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:00,053 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 [2021-07-09 17:38:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,054 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:38:00,054 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:38:00,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:38:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-07-09 17:38:00,059 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) [2021-07-09 17:38:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1083 transitions. [2021-07-09 17:38:00,060 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1083 transitions. Word has length 20 [2021-07-09 17:38:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,060 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1083 transitions. [2021-07-09 17:38:00,060 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) [2021-07-09 17:38:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1083 transitions. [2021-07-09 17:38:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:00,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,061 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-09 17:38:00,277 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 156 times [2021-07-09 17:38:00,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753174860] [2021-07-09 17:38:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753174860] [2021-07-09 17:38:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753174860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654697747] [2021-07-09 17:38:00,348 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 [2021-07-09 17:38:00,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654697747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:00,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:00,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813482507] [2021-07-09 17:38:00,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:00,523 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) [2021-07-09 17:38:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,731 INFO L93 Difference]: Finished difference Result 472 states and 1394 transitions. [2021-07-09 17:38:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:00,731 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 [2021-07-09 17:38:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,732 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:38:00,732 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:38:00,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:38:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 345. [2021-07-09 17:38:00,736 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) [2021-07-09 17:38:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-09 17:38:00,737 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-09 17:38:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,737 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-09 17:38:00,737 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) [2021-07-09 17:38:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-09 17:38:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:00,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-07-09 17:38:00,938 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 157 times [2021-07-09 17:38:00,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097443169] [2021-07-09 17:38:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097443169] [2021-07-09 17:38:01,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097443169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798860993] [2021-07-09 17:38:01,020 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 [2021-07-09 17:38:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798860993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:01,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396896097] [2021-07-09 17:38:01,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:01,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:01,201 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) [2021-07-09 17:38:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:01,416 INFO L93 Difference]: Finished difference Result 497 states and 1428 transitions. [2021-07-09 17:38:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:01,416 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 [2021-07-09 17:38:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:01,417 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:38:01,417 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:38:01,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:38:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 349. [2021-07-09 17:38:01,421 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) [2021-07-09 17:38:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1082 transitions. [2021-07-09 17:38:01,422 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1082 transitions. Word has length 20 [2021-07-09 17:38:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:01,422 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1082 transitions. [2021-07-09 17:38:01,422 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) [2021-07-09 17:38:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1082 transitions. [2021-07-09 17:38:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:01,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:01,422 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:01,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:01,623 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 158 times [2021-07-09 17:38:01,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:01,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652777245] [2021-07-09 17:38:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:01,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652777245] [2021-07-09 17:38:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652777245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678909496] [2021-07-09 17:38:01,684 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 [2021-07-09 17:38:01,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678909496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:01,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139254615] [2021-07-09 17:38:01,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:01,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:01,862 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) [2021-07-09 17:38:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,101 INFO L93 Difference]: Finished difference Result 503 states and 1449 transitions. [2021-07-09 17:38:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:02,101 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 [2021-07-09 17:38:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,102 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:38:02,102 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:38:02,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:38:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 346. [2021-07-09 17:38:02,106 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) [2021-07-09 17:38:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1072 transitions. [2021-07-09 17:38:02,107 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,107 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1072 transitions. [2021-07-09 17:38:02,107 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) [2021-07-09 17:38:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1072 transitions. [2021-07-09 17:38:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:02,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,107 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,308 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 159 times [2021-07-09 17:38:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849337951] [2021-07-09 17:38:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849337951] [2021-07-09 17:38:02,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849337951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065436137] [2021-07-09 17:38:02,379 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 [2021-07-09 17:38:02,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065436137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:02,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:02,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588203328] [2021-07-09 17:38:02,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:02,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:02,582 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) [2021-07-09 17:38:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,822 INFO L93 Difference]: Finished difference Result 433 states and 1294 transitions. [2021-07-09 17:38:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:02,822 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 [2021-07-09 17:38:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,823 INFO L225 Difference]: With dead ends: 433 [2021-07-09 17:38:02,823 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:38:02,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:38:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2021-07-09 17:38:02,826 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) [2021-07-09 17:38:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1074 transitions. [2021-07-09 17:38:02,827 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1074 transitions. Word has length 20 [2021-07-09 17:38:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,827 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1074 transitions. [2021-07-09 17:38:02,827 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) [2021-07-09 17:38:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1074 transitions. [2021-07-09 17:38:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:02,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,828 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,033 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 160 times [2021-07-09 17:38:03,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987500662] [2021-07-09 17:38:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987500662] [2021-07-09 17:38:03,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987500662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158266183] [2021-07-09 17:38:03,097 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 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 [2021-07-09 17:38:03,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:03,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158266183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623315213] [2021-07-09 17:38:03,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:03,275 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) [2021-07-09 17:38:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:03,480 INFO L93 Difference]: Finished difference Result 421 states and 1261 transitions. [2021-07-09 17:38:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:03,481 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 [2021-07-09 17:38:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:03,481 INFO L225 Difference]: With dead ends: 421 [2021-07-09 17:38:03,481 INFO L226 Difference]: Without dead ends: 421 [2021-07-09 17:38:03,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-09 17:38:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2021-07-09 17:38:03,485 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) [2021-07-09 17:38:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-07-09 17:38:03,485 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-07-09 17:38:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:03,486 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-07-09 17:38:03,486 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) [2021-07-09 17:38:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-07-09 17:38:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:03,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:03,486 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,687 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 161 times [2021-07-09 17:38:03,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778282844] [2021-07-09 17:38:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778282844] [2021-07-09 17:38:03,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778282844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190193469] [2021-07-09 17:38:03,755 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 [2021-07-09 17:38:03,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190193469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850690566] [2021-07-09 17:38:03,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:03,937 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) [2021-07-09 17:38:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:04,155 INFO L93 Difference]: Finished difference Result 376 states and 1139 transitions. [2021-07-09 17:38:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:04,156 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 [2021-07-09 17:38:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:04,156 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:38:04,156 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:38:04,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:38:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2021-07-09 17:38:04,161 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) [2021-07-09 17:38:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1025 transitions. [2021-07-09 17:38:04,161 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1025 transitions. Word has length 20 [2021-07-09 17:38:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:04,162 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1025 transitions. [2021-07-09 17:38:04,162 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) [2021-07-09 17:38:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1025 transitions. [2021-07-09 17:38:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:04,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:04,162 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:04,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-07-09 17:38:04,386 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 162 times [2021-07-09 17:38:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:04,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862452597] [2021-07-09 17:38:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:04,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862452597] [2021-07-09 17:38:04,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862452597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774012203] [2021-07-09 17:38:04,446 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 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 [2021-07-09 17:38:04,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:04,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774012203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:04,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334453018] [2021-07-09 17:38:04,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:04,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:04,637 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) [2021-07-09 17:38:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:04,867 INFO L93 Difference]: Finished difference Result 421 states and 1233 transitions. [2021-07-09 17:38:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:04,868 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 [2021-07-09 17:38:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:04,868 INFO L225 Difference]: With dead ends: 421 [2021-07-09 17:38:04,868 INFO L226 Difference]: Without dead ends: 415 [2021-07-09 17:38:04,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-09 17:38:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 347. [2021-07-09 17:38:04,872 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) [2021-07-09 17:38:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2021-07-09 17:38:04,872 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2021-07-09 17:38:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:04,872 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2021-07-09 17:38:04,872 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) [2021-07-09 17:38:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2021-07-09 17:38:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:04,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:04,873 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-07-09 17:38:05,073 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 163 times [2021-07-09 17:38:05,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881839816] [2021-07-09 17:38:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881839816] [2021-07-09 17:38:05,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881839816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462102859] [2021-07-09 17:38:05,134 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 [2021-07-09 17:38:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462102859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:05,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:05,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196283588] [2021-07-09 17:38:05,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:05,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:05,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:05,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:05,347 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) [2021-07-09 17:38:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:05,573 INFO L93 Difference]: Finished difference Result 427 states and 1254 transitions. [2021-07-09 17:38:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:05,574 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 [2021-07-09 17:38:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:05,574 INFO L225 Difference]: With dead ends: 427 [2021-07-09 17:38:05,574 INFO L226 Difference]: Without dead ends: 427 [2021-07-09 17:38:05,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-09 17:38:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 345. [2021-07-09 17:38:05,579 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) [2021-07-09 17:38:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2021-07-09 17:38:05,580 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2021-07-09 17:38:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:05,580 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2021-07-09 17:38:05,580 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) [2021-07-09 17:38:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2021-07-09 17:38:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:05,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:05,581 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-09 17:38:05,793 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 164 times [2021-07-09 17:38:05,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882382649] [2021-07-09 17:38:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882382649] [2021-07-09 17:38:05,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882382649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433539344] [2021-07-09 17:38:05,873 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 [2021-07-09 17:38:05,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:05,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433539344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:06,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027855610] [2021-07-09 17:38:06,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:06,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:06,041 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) [2021-07-09 17:38:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:06,226 INFO L93 Difference]: Finished difference Result 396 states and 1189 transitions. [2021-07-09 17:38:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:06,226 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 [2021-07-09 17:38:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:06,227 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:38:06,227 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:38:06,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:38:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 332. [2021-07-09 17:38:06,230 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) [2021-07-09 17:38:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-07-09 17:38:06,231 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-07-09 17:38:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:06,231 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-07-09 17:38:06,231 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) [2021-07-09 17:38:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-07-09 17:38:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:06,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:06,232 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:06,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-09 17:38:06,432 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 165 times [2021-07-09 17:38:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:06,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973016215] [2021-07-09 17:38:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:06,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973016215] [2021-07-09 17:38:06,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973016215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942843452] [2021-07-09 17:38:06,483 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 [2021-07-09 17:38:06,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:06,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942843452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:06,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:06,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405479107] [2021-07-09 17:38:06,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:06,626 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) [2021-07-09 17:38:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:06,779 INFO L93 Difference]: Finished difference Result 366 states and 1100 transitions. [2021-07-09 17:38:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:06,779 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 [2021-07-09 17:38:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:06,780 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:38:06,780 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 17:38:06,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 17:38:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2021-07-09 17:38:06,784 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) [2021-07-09 17:38:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1031 transitions. [2021-07-09 17:38:06,785 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1031 transitions. Word has length 20 [2021-07-09 17:38:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:06,785 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1031 transitions. [2021-07-09 17:38:06,786 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) [2021-07-09 17:38:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1031 transitions. [2021-07-09 17:38:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:06,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:06,786 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:07,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,001 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 166 times [2021-07-09 17:38:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:07,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675009745] [2021-07-09 17:38:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675009745] [2021-07-09 17:38:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675009745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245199166] [2021-07-09 17:38:07,051 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 [2021-07-09 17:38:07,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:07,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245199166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:07,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723001738] [2021-07-09 17:38:07,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:07,229 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) [2021-07-09 17:38:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,410 INFO L93 Difference]: Finished difference Result 391 states and 1152 transitions. [2021-07-09 17:38:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:07,411 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 [2021-07-09 17:38:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,411 INFO L225 Difference]: With dead ends: 391 [2021-07-09 17:38:07,411 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:38:07,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:38:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 346. [2021-07-09 17:38:07,415 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) [2021-07-09 17:38:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1058 transitions. [2021-07-09 17:38:07,415 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1058 transitions. Word has length 20 [2021-07-09 17:38:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,415 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1058 transitions. [2021-07-09 17:38:07,415 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) [2021-07-09 17:38:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1058 transitions. [2021-07-09 17:38:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:07,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,416 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-07-09 17:38:07,616 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 167 times [2021-07-09 17:38:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784340509] [2021-07-09 17:38:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784340509] [2021-07-09 17:38:07,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784340509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725923365] [2021-07-09 17:38:07,668 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 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 [2021-07-09 17:38:07,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:07,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725923365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:07,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:07,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726806595] [2021-07-09 17:38:07,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:07,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:07,812 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) [2021-07-09 17:38:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,937 INFO L93 Difference]: Finished difference Result 362 states and 1098 transitions. [2021-07-09 17:38:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:07,938 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 [2021-07-09 17:38:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,938 INFO L225 Difference]: With dead ends: 362 [2021-07-09 17:38:07,938 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:38:07,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:38:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 334. [2021-07-09 17:38:07,941 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) [2021-07-09 17:38:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-07-09 17:38:07,942 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-07-09 17:38:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,942 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-07-09 17:38:07,942 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) [2021-07-09 17:38:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-07-09 17:38:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:07,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,943 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,143 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 168 times [2021-07-09 17:38:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600086687] [2021-07-09 17:38:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600086687] [2021-07-09 17:38:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600086687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120805636] [2021-07-09 17:38:08,194 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 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 [2021-07-09 17:38:08,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:08,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120805636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:08,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594730408] [2021-07-09 17:38:08,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:08,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:08,344 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) [2021-07-09 17:38:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:08,465 INFO L93 Difference]: Finished difference Result 397 states and 1167 transitions. [2021-07-09 17:38:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:08,465 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 [2021-07-09 17:38:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:08,466 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:38:08,466 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 17:38:08,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 17:38:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-07-09 17:38:08,469 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) [2021-07-09 17:38:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1065 transitions. [2021-07-09 17:38:08,470 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1065 transitions. Word has length 20 [2021-07-09 17:38:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:08,470 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1065 transitions. [2021-07-09 17:38:08,470 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) [2021-07-09 17:38:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1065 transitions. [2021-07-09 17:38:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:08,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:08,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-07-09 17:38:08,671 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 169 times [2021-07-09 17:38:08,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211035887] [2021-07-09 17:38:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211035887] [2021-07-09 17:38:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211035887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512961510] [2021-07-09 17:38:08,723 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 [2021-07-09 17:38:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512961510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927086070] [2021-07-09 17:38:08,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:08,864 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) [2021-07-09 17:38:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,001 INFO L93 Difference]: Finished difference Result 397 states and 1173 transitions. [2021-07-09 17:38:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:09,002 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 [2021-07-09 17:38:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,002 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:38:09,003 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:38:09,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:38:09,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 346. [2021-07-09 17:38:09,006 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) [2021-07-09 17:38:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2021-07-09 17:38:09,006 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2021-07-09 17:38:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,007 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2021-07-09 17:38:09,007 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) [2021-07-09 17:38:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2021-07-09 17:38:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:09,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,007 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,209 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 170 times [2021-07-09 17:38:09,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092359481] [2021-07-09 17:38:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092359481] [2021-07-09 17:38:09,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092359481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852541577] [2021-07-09 17:38:09,262 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 [2021-07-09 17:38:09,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852541577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:09,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:38:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290234161] [2021-07-09 17:38:09,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:38:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:38:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:38:09,400 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) [2021-07-09 17:38:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,518 INFO L93 Difference]: Finished difference Result 372 states and 1123 transitions. [2021-07-09 17:38:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:09,518 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 [2021-07-09 17:38:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,519 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:38:09,519 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:38:09,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:38:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 334. [2021-07-09 17:38:09,522 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) [2021-07-09 17:38:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-07-09 17:38:09,523 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-07-09 17:38:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,523 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-07-09 17:38:09,523 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) [2021-07-09 17:38:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-07-09 17:38:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:09,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,523 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-07-09 17:38:09,724 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 171 times [2021-07-09 17:38:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760790893] [2021-07-09 17:38:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760790893] [2021-07-09 17:38:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760790893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094128413] [2021-07-09 17:38:09,790 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 [2021-07-09 17:38:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094128413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:10,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663308469] [2021-07-09 17:38:10,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:10,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:10,044 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) [2021-07-09 17:38:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:10,458 INFO L93 Difference]: Finished difference Result 550 states and 1636 transitions. [2021-07-09 17:38:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:10,458 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 [2021-07-09 17:38:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:10,459 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:38:10,459 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:38:10,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:38:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-07-09 17:38:10,463 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) [2021-07-09 17:38:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-07-09 17:38:10,464 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-07-09 17:38:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:10,464 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-07-09 17:38:10,464 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) [2021-07-09 17:38:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-07-09 17:38:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:10,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:10,464 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:10,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,665 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 172 times [2021-07-09 17:38:10,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:10,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952480978] [2021-07-09 17:38:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:10,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952480978] [2021-07-09 17:38:10,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952480978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204647813] [2021-07-09 17:38:10,725 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 [2021-07-09 17:38:10,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:10,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204647813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:10,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:10,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897487630] [2021-07-09 17:38:10,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:10,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:10,927 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) [2021-07-09 17:38:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:11,315 INFO L93 Difference]: Finished difference Result 556 states and 1643 transitions. [2021-07-09 17:38:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:11,316 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 [2021-07-09 17:38:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:11,317 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:38:11,317 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:38:11,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:38:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-07-09 17:38:11,321 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) [2021-07-09 17:38:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1057 transitions. [2021-07-09 17:38:11,321 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1057 transitions. Word has length 20 [2021-07-09 17:38:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:11,321 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1057 transitions. [2021-07-09 17:38:11,321 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) [2021-07-09 17:38:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1057 transitions. [2021-07-09 17:38:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:11,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:11,322 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:11,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1723 [2021-07-09 17:38:11,522 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 173 times [2021-07-09 17:38:11,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:11,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685615363] [2021-07-09 17:38:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:11,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685615363] [2021-07-09 17:38:11,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685615363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659878012] [2021-07-09 17:38:11,579 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 [2021-07-09 17:38:11,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659878012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:11,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539101461] [2021-07-09 17:38:11,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:11,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:11,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:11,784 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) [2021-07-09 17:38:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,091 INFO L93 Difference]: Finished difference Result 520 states and 1561 transitions. [2021-07-09 17:38:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:12,091 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 [2021-07-09 17:38:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,092 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:38:12,092 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:38:12,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:38:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 339. [2021-07-09 17:38:12,096 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) [2021-07-09 17:38:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1046 transitions. [2021-07-09 17:38:12,096 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1046 transitions. Word has length 20 [2021-07-09 17:38:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,096 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1046 transitions. [2021-07-09 17:38:12,096 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) [2021-07-09 17:38:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1046 transitions. [2021-07-09 17:38:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:12,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,097 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:12,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-07-09 17:38:12,297 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:12,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 174 times [2021-07-09 17:38:12,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:12,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51730148] [2021-07-09 17:38:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:12,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51730148] [2021-07-09 17:38:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51730148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820573544] [2021-07-09 17:38:12,351 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 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 [2021-07-09 17:38:12,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820573544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:12,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438042375] [2021-07-09 17:38:12,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:12,574 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) [2021-07-09 17:38:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,942 INFO L93 Difference]: Finished difference Result 552 states and 1621 transitions. [2021-07-09 17:38:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:12,942 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 [2021-07-09 17:38:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,943 INFO L225 Difference]: With dead ends: 552 [2021-07-09 17:38:12,943 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:38:12,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:38:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-07-09 17:38:12,947 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) [2021-07-09 17:38:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-07-09 17:38:12,947 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-07-09 17:38:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,947 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-07-09 17:38:12,947 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) [2021-07-09 17:38:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-07-09 17:38:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:12,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,948 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,148 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 175 times [2021-07-09 17:38:13,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658096896] [2021-07-09 17:38:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658096896] [2021-07-09 17:38:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658096896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113757369] [2021-07-09 17:38:13,212 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 [2021-07-09 17:38:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:13,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113757369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:13,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:13,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389855488] [2021-07-09 17:38:13,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:13,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:13,442 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) [2021-07-09 17:38:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:13,707 INFO L93 Difference]: Finished difference Result 562 states and 1666 transitions. [2021-07-09 17:38:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:13,708 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 [2021-07-09 17:38:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:13,708 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:38:13,708 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:38:13,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:38:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 343. [2021-07-09 17:38:13,713 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) [2021-07-09 17:38:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1062 transitions. [2021-07-09 17:38:13,713 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1062 transitions. Word has length 20 [2021-07-09 17:38:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1062 transitions. [2021-07-09 17:38:13,713 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) [2021-07-09 17:38:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1062 transitions. [2021-07-09 17:38:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:13,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:13,714 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-07-09 17:38:13,914 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 176 times [2021-07-09 17:38:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107897152] [2021-07-09 17:38:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107897152] [2021-07-09 17:38:13,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107897152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525142636] [2021-07-09 17:38:13,978 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 [2021-07-09 17:38:14,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:14,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525142636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:14,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:14,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565673861] [2021-07-09 17:38:14,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:14,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:14,189 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) [2021-07-09 17:38:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,512 INFO L93 Difference]: Finished difference Result 568 states and 1673 transitions. [2021-07-09 17:38:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:14,512 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 [2021-07-09 17:38:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,513 INFO L225 Difference]: With dead ends: 568 [2021-07-09 17:38:14,513 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:38:14,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:38:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 340. [2021-07-09 17:38:14,517 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) [2021-07-09 17:38:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1051 transitions. [2021-07-09 17:38:14,517 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1051 transitions. Word has length 20 [2021-07-09 17:38:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1051 transitions. [2021-07-09 17:38:14,518 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) [2021-07-09 17:38:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1051 transitions. [2021-07-09 17:38:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:14,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,518 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,719 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 177 times [2021-07-09 17:38:14,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678618447] [2021-07-09 17:38:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678618447] [2021-07-09 17:38:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678618447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544374547] [2021-07-09 17:38:14,780 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 [2021-07-09 17:38:14,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544374547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:14,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:14,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074019084] [2021-07-09 17:38:14,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:14,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:15,000 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) [2021-07-09 17:38:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:15,252 INFO L93 Difference]: Finished difference Result 532 states and 1591 transitions. [2021-07-09 17:38:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:15,252 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 [2021-07-09 17:38:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:15,253 INFO L225 Difference]: With dead ends: 532 [2021-07-09 17:38:15,253 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:38:15,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:38:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 337. [2021-07-09 17:38:15,257 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) [2021-07-09 17:38:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-09 17:38:15,257 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:15,257 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-09 17:38:15,257 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) [2021-07-09 17:38:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-09 17:38:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:15,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:15,258 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:15,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-07-09 17:38:15,458 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 178 times [2021-07-09 17:38:15,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:15,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64533603] [2021-07-09 17:38:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:15,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64533603] [2021-07-09 17:38:15,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64533603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297117553] [2021-07-09 17:38:15,527 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 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 [2021-07-09 17:38:15,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:15,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297117553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:15,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581169090] [2021-07-09 17:38:15,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:15,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:15,737 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) [2021-07-09 17:38:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:16,188 INFO L93 Difference]: Finished difference Result 640 states and 1863 transitions. [2021-07-09 17:38:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:16,188 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 [2021-07-09 17:38:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:16,189 INFO L225 Difference]: With dead ends: 640 [2021-07-09 17:38:16,189 INFO L226 Difference]: Without dead ends: 640 [2021-07-09 17:38:16,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-09 17:38:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2021-07-09 17:38:16,194 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) [2021-07-09 17:38:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1076 transitions. [2021-07-09 17:38:16,194 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1076 transitions. Word has length 20 [2021-07-09 17:38:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:16,194 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1076 transitions. [2021-07-09 17:38:16,194 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) [2021-07-09 17:38:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1076 transitions. [2021-07-09 17:38:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:16,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:16,195 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:16,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-09 17:38:16,395 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 179 times [2021-07-09 17:38:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:16,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339246273] [2021-07-09 17:38:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:16,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339246273] [2021-07-09 17:38:16,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339246273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305787354] [2021-07-09 17:38:16,461 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 [2021-07-09 17:38:16,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305787354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:16,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592980057] [2021-07-09 17:38:16,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:16,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:16,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:16,694 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) [2021-07-09 17:38:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:17,266 INFO L93 Difference]: Finished difference Result 646 states and 1864 transitions. [2021-07-09 17:38:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:17,267 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 [2021-07-09 17:38:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:17,268 INFO L225 Difference]: With dead ends: 646 [2021-07-09 17:38:17,268 INFO L226 Difference]: Without dead ends: 640 [2021-07-09 17:38:17,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-09 17:38:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-07-09 17:38:17,274 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) [2021-07-09 17:38:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1078 transitions. [2021-07-09 17:38:17,275 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1078 transitions. Word has length 20 [2021-07-09 17:38:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:17,275 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1078 transitions. [2021-07-09 17:38:17,275 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) [2021-07-09 17:38:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1078 transitions. [2021-07-09 17:38:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:17,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:17,276 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:17,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,498 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 180 times [2021-07-09 17:38:17,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:17,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779748514] [2021-07-09 17:38:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779748514] [2021-07-09 17:38:17,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779748514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830983188] [2021-07-09 17:38:17,575 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 [2021-07-09 17:38:17,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830983188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:17,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464122623] [2021-07-09 17:38:17,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:17,835 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) [2021-07-09 17:38:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,102 INFO L93 Difference]: Finished difference Result 608 states and 1784 transitions. [2021-07-09 17:38:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:18,102 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 [2021-07-09 17:38:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,103 INFO L225 Difference]: With dead ends: 608 [2021-07-09 17:38:18,103 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 17:38:18,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 17:38:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 341. [2021-07-09 17:38:18,108 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) [2021-07-09 17:38:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1060 transitions. [2021-07-09 17:38:18,108 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1060 transitions. Word has length 20 [2021-07-09 17:38:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,108 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1060 transitions. [2021-07-09 17:38:18,108 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) [2021-07-09 17:38:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1060 transitions. [2021-07-09 17:38:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:18,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,109 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-07-09 17:38:18,309 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 181 times [2021-07-09 17:38:18,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3916626] [2021-07-09 17:38:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:18,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3916626] [2021-07-09 17:38:18,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3916626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532090350] [2021-07-09 17:38:18,379 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 [2021-07-09 17:38:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532090350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:18,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:18,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592915000] [2021-07-09 17:38:18,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:18,637 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) [2021-07-09 17:38:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,920 INFO L93 Difference]: Finished difference Result 571 states and 1702 transitions. [2021-07-09 17:38:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:18,920 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 [2021-07-09 17:38:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,921 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:38:18,921 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 17:38:18,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 17:38:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 338. [2021-07-09 17:38:18,925 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) [2021-07-09 17:38:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1045 transitions. [2021-07-09 17:38:18,926 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1045 transitions. Word has length 20 [2021-07-09 17:38:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,926 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1045 transitions. [2021-07-09 17:38:18,926 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) [2021-07-09 17:38:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1045 transitions. [2021-07-09 17:38:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:18,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,926 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:19,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,127 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 182 times [2021-07-09 17:38:19,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:19,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664192933] [2021-07-09 17:38:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:19,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664192933] [2021-07-09 17:38:19,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664192933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939499754] [2021-07-09 17:38:19,196 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 [2021-07-09 17:38:19,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:19,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939499754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:19,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:19,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877124042] [2021-07-09 17:38:19,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:19,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:19,406 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) [2021-07-09 17:38:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:19,926 INFO L93 Difference]: Finished difference Result 608 states and 1776 transitions. [2021-07-09 17:38:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:19,927 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 [2021-07-09 17:38:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:19,928 INFO L225 Difference]: With dead ends: 608 [2021-07-09 17:38:19,928 INFO L226 Difference]: Without dead ends: 602 [2021-07-09 17:38:19,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-09 17:38:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 348. [2021-07-09 17:38:19,932 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) [2021-07-09 17:38:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1072 transitions. [2021-07-09 17:38:19,932 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1072 transitions. [2021-07-09 17:38:19,933 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) [2021-07-09 17:38:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1072 transitions. [2021-07-09 17:38:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:19,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:19,933 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:20,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1817,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:20,134 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 183 times [2021-07-09 17:38:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:20,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320469074] [2021-07-09 17:38:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320469074] [2021-07-09 17:38:20,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320469074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924210758] [2021-07-09 17:38:20,199 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 [2021-07-09 17:38:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924210758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:20,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:20,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140159175] [2021-07-09 17:38:20,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:20,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:20,447 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) [2021-07-09 17:38:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:20,903 INFO L93 Difference]: Finished difference Result 585 states and 1737 transitions. [2021-07-09 17:38:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:20,904 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 [2021-07-09 17:38:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:20,905 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:38:20,905 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:38:20,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:38:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 337. [2021-07-09 17:38:20,909 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) [2021-07-09 17:38:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-09 17:38:20,909 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:20,909 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-09 17:38:20,909 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) [2021-07-09 17:38:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-09 17:38:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:20,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:20,910 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,110 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 184 times [2021-07-09 17:38:21,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798367341] [2021-07-09 17:38:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798367341] [2021-07-09 17:38:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798367341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34019097] [2021-07-09 17:38:21,174 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 [2021-07-09 17:38:21,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:21,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34019097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:21,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:21,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582951965] [2021-07-09 17:38:21,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:21,408 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) [2021-07-09 17:38:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,669 INFO L93 Difference]: Finished difference Result 525 states and 1574 transitions. [2021-07-09 17:38:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:21,669 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 [2021-07-09 17:38:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:21,670 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:38:21,670 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:38:21,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:38:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2021-07-09 17:38:21,673 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) [2021-07-09 17:38:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1045 transitions. [2021-07-09 17:38:21,674 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1045 transitions. Word has length 20 [2021-07-09 17:38:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:21,674 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1045 transitions. [2021-07-09 17:38:21,674 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) [2021-07-09 17:38:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1045 transitions. [2021-07-09 17:38:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:21,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:21,675 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,875 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 185 times [2021-07-09 17:38:21,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776201568] [2021-07-09 17:38:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776201568] [2021-07-09 17:38:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776201568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969168803] [2021-07-09 17:38:21,952 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 [2021-07-09 17:38:22,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969168803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:22,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169000697] [2021-07-09 17:38:22,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:22,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:22,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:22,195 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) [2021-07-09 17:38:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,687 INFO L93 Difference]: Finished difference Result 550 states and 1626 transitions. [2021-07-09 17:38:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:22,687 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 [2021-07-09 17:38:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,688 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:38:22,688 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:38:22,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:38:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 349. [2021-07-09 17:38:22,692 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) [2021-07-09 17:38:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-07-09 17:38:22,693 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,693 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-07-09 17:38:22,693 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) [2021-07-09 17:38:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-07-09 17:38:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:22,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,693 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,894 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,894 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 186 times [2021-07-09 17:38:22,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374177986] [2021-07-09 17:38:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374177986] [2021-07-09 17:38:22,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374177986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121932564] [2021-07-09 17:38:22,958 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 [2021-07-09 17:38:23,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121932564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:23,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549146400] [2021-07-09 17:38:23,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:23,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:23,191 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) [2021-07-09 17:38:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:23,495 INFO L93 Difference]: Finished difference Result 521 states and 1572 transitions. [2021-07-09 17:38:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:23,495 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 [2021-07-09 17:38:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:23,496 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:38:23,496 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:38:23,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:38:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 336. [2021-07-09 17:38:23,500 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) [2021-07-09 17:38:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-07-09 17:38:23,501 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-07-09 17:38:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:23,501 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-07-09 17:38:23,501 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) [2021-07-09 17:38:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-07-09 17:38:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:23,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:23,501 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:23,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,702 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 187 times [2021-07-09 17:38:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:23,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875401333] [2021-07-09 17:38:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875401333] [2021-07-09 17:38:23,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875401333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214761528] [2021-07-09 17:38:23,755 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 [2021-07-09 17:38:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214761528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946936637] [2021-07-09 17:38:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:23,943 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) [2021-07-09 17:38:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:24,253 INFO L93 Difference]: Finished difference Result 615 states and 1779 transitions. [2021-07-09 17:38:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:24,253 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 [2021-07-09 17:38:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:24,254 INFO L225 Difference]: With dead ends: 615 [2021-07-09 17:38:24,254 INFO L226 Difference]: Without dead ends: 597 [2021-07-09 17:38:24,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-09 17:38:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 338. [2021-07-09 17:38:24,258 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) [2021-07-09 17:38:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1040 transitions. [2021-07-09 17:38:24,258 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:24,259 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1040 transitions. [2021-07-09 17:38:24,259 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) [2021-07-09 17:38:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1040 transitions. [2021-07-09 17:38:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:24,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:24,259 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:24,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-07-09 17:38:24,460 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 188 times [2021-07-09 17:38:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:24,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629947273] [2021-07-09 17:38:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:24,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629947273] [2021-07-09 17:38:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629947273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421523417] [2021-07-09 17:38:24,517 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 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 [2021-07-09 17:38:24,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421523417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:24,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639921068] [2021-07-09 17:38:24,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:24,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:24,730 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) [2021-07-09 17:38:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:25,080 INFO L93 Difference]: Finished difference Result 576 states and 1700 transitions. [2021-07-09 17:38:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:25,080 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 [2021-07-09 17:38:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:25,081 INFO L225 Difference]: With dead ends: 576 [2021-07-09 17:38:25,081 INFO L226 Difference]: Without dead ends: 564 [2021-07-09 17:38:25,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-09 17:38:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-07-09 17:38:25,085 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) [2021-07-09 17:38:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-07-09 17:38:25,085 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-07-09 17:38:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:25,086 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-07-09 17:38:25,086 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) [2021-07-09 17:38:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-07-09 17:38:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:25,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:25,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,287 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 189 times [2021-07-09 17:38:25,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115180506] [2021-07-09 17:38:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115180506] [2021-07-09 17:38:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115180506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998804330] [2021-07-09 17:38:25,348 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 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 [2021-07-09 17:38:25,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:25,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998804330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:25,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:25,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532171285] [2021-07-09 17:38:25,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:25,592 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) [2021-07-09 17:38:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:26,111 INFO L93 Difference]: Finished difference Result 601 states and 1752 transitions. [2021-07-09 17:38:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:26,111 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 [2021-07-09 17:38:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:26,112 INFO L225 Difference]: With dead ends: 601 [2021-07-09 17:38:26,112 INFO L226 Difference]: Without dead ends: 595 [2021-07-09 17:38:26,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-09 17:38:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 350. [2021-07-09 17:38:26,117 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) [2021-07-09 17:38:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1072 transitions. [2021-07-09 17:38:26,117 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:26,117 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1072 transitions. [2021-07-09 17:38:26,117 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) [2021-07-09 17:38:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1072 transitions. [2021-07-09 17:38:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:26,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:26,118 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:26,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-07-09 17:38:26,320 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:26,320 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 190 times [2021-07-09 17:38:26,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:26,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528756793] [2021-07-09 17:38:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528756793] [2021-07-09 17:38:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528756793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586572886] [2021-07-09 17:38:26,387 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 [2021-07-09 17:38:26,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586572886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:26,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:26,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337377670] [2021-07-09 17:38:26,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:26,626 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) [2021-07-09 17:38:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:26,940 INFO L93 Difference]: Finished difference Result 572 states and 1698 transitions. [2021-07-09 17:38:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:26,940 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 [2021-07-09 17:38:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:26,941 INFO L225 Difference]: With dead ends: 572 [2021-07-09 17:38:26,941 INFO L226 Difference]: Without dead ends: 572 [2021-07-09 17:38:26,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-09 17:38:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 335. [2021-07-09 17:38:26,945 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) [2021-07-09 17:38:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-07-09 17:38:26,946 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-07-09 17:38:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:26,946 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-07-09 17:38:26,946 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) [2021-07-09 17:38:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-07-09 17:38:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:26,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:26,946 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1889 [2021-07-09 17:38:27,147 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 191 times [2021-07-09 17:38:27,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492356014] [2021-07-09 17:38:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492356014] [2021-07-09 17:38:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492356014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742575808] [2021-07-09 17:38:27,248 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 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 [2021-07-09 17:38:27,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:27,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742575808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:27,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686517591] [2021-07-09 17:38:27,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:27,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:27,466 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) [2021-07-09 17:38:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,745 INFO L93 Difference]: Finished difference Result 433 states and 1285 transitions. [2021-07-09 17:38:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:27,746 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 [2021-07-09 17:38:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,747 INFO L225 Difference]: With dead ends: 433 [2021-07-09 17:38:27,747 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:38:27,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:38:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 343. [2021-07-09 17:38:27,750 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) [2021-07-09 17:38:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-07-09 17:38:27,751 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-07-09 17:38:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,751 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-07-09 17:38:27,751 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) [2021-07-09 17:38:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-07-09 17:38:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:27,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,752 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:27,952 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,952 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 192 times [2021-07-09 17:38:27,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505181645] [2021-07-09 17:38:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505181645] [2021-07-09 17:38:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505181645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182610685] [2021-07-09 17:38:28,028 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 [2021-07-09 17:38:28,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:28,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182610685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102054725] [2021-07-09 17:38:28,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:28,241 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) [2021-07-09 17:38:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,478 INFO L93 Difference]: Finished difference Result 439 states and 1292 transitions. [2021-07-09 17:38:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:28,478 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 [2021-07-09 17:38:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,479 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:38:28,479 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:38:28,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:38:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 340. [2021-07-09 17:38:28,482 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) [2021-07-09 17:38:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-09 17:38:28,483 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-09 17:38:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-09 17:38:28,483 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) [2021-07-09 17:38:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-09 17:38:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:28,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,483 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:28,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,684 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 193 times [2021-07-09 17:38:28,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:28,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964137876] [2021-07-09 17:38:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964137876] [2021-07-09 17:38:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964137876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779994763] [2021-07-09 17:38:28,742 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 [2021-07-09 17:38:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779994763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:28,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047361368] [2021-07-09 17:38:28,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:28,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:28,948 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) [2021-07-09 17:38:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,181 INFO L93 Difference]: Finished difference Result 403 states and 1210 transitions. [2021-07-09 17:38:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:29,181 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 [2021-07-09 17:38:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,182 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:38:29,182 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 17:38:29,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 17:38:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-07-09 17:38:29,185 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) [2021-07-09 17:38:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-07-09 17:38:29,186 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-07-09 17:38:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,186 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-07-09 17:38:29,186 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) [2021-07-09 17:38:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-07-09 17:38:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:29,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,186 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,387 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 194 times [2021-07-09 17:38:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911434113] [2021-07-09 17:38:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911434113] [2021-07-09 17:38:29,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911434113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604934516] [2021-07-09 17:38:29,455 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 [2021-07-09 17:38:29,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604934516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:29,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104568978] [2021-07-09 17:38:29,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:29,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:29,650 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) [2021-07-09 17:38:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,917 INFO L93 Difference]: Finished difference Result 520 states and 1503 transitions. [2021-07-09 17:38:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:29,917 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 [2021-07-09 17:38:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,918 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:38:29,918 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:38:29,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:38:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-07-09 17:38:29,922 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) [2021-07-09 17:38:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1075 transitions. [2021-07-09 17:38:29,923 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1075 transitions. Word has length 20 [2021-07-09 17:38:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,923 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1075 transitions. [2021-07-09 17:38:29,923 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) [2021-07-09 17:38:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1075 transitions. [2021-07-09 17:38:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:29,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,924 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:30,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-07-09 17:38:30,124 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 195 times [2021-07-09 17:38:30,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:30,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184048024] [2021-07-09 17:38:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184048024] [2021-07-09 17:38:30,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184048024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300577841] [2021-07-09 17:38:30,186 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 [2021-07-09 17:38:30,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:30,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:30,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300577841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:30,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:30,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472136669] [2021-07-09 17:38:30,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:30,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:30,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:30,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:30,383 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) [2021-07-09 17:38:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:30,682 INFO L93 Difference]: Finished difference Result 526 states and 1504 transitions. [2021-07-09 17:38:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:30,683 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 [2021-07-09 17:38:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:30,684 INFO L225 Difference]: With dead ends: 526 [2021-07-09 17:38:30,684 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:38:30,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:38:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2021-07-09 17:38:30,688 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) [2021-07-09 17:38:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1077 transitions. [2021-07-09 17:38:30,688 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1077 transitions. Word has length 20 [2021-07-09 17:38:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:30,688 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1077 transitions. [2021-07-09 17:38:30,688 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) [2021-07-09 17:38:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1077 transitions. [2021-07-09 17:38:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:30,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:30,689 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:30,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,889 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 196 times [2021-07-09 17:38:30,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:30,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037430156] [2021-07-09 17:38:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037430156] [2021-07-09 17:38:30,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037430156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504483901] [2021-07-09 17:38:30,954 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 [2021-07-09 17:38:31,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504483901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706520934] [2021-07-09 17:38:31,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:31,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:31,160 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) [2021-07-09 17:38:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:31,331 INFO L93 Difference]: Finished difference Result 488 states and 1424 transitions. [2021-07-09 17:38:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:31,331 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 [2021-07-09 17:38:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:31,332 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:31,332 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:38:31,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:38:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 341. [2021-07-09 17:38:31,336 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) [2021-07-09 17:38:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-07-09 17:38:31,336 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-07-09 17:38:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:31,336 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-07-09 17:38:31,336 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) [2021-07-09 17:38:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-07-09 17:38:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:31,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:31,337 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:31,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,538 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 197 times [2021-07-09 17:38:31,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:31,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199214312] [2021-07-09 17:38:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199214312] [2021-07-09 17:38:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199214312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489367966] [2021-07-09 17:38:31,602 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 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 [2021-07-09 17:38:31,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:31,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489367966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875630684] [2021-07-09 17:38:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:31,850 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) [2021-07-09 17:38:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:32,062 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-07-09 17:38:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:32,062 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 [2021-07-09 17:38:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:32,063 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:38:32,063 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:38:32,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:38:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 338. [2021-07-09 17:38:32,066 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) [2021-07-09 17:38:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-07-09 17:38:32,067 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-07-09 17:38:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:32,067 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-07-09 17:38:32,067 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) [2021-07-09 17:38:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-07-09 17:38:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:32,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:32,067 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:32,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1957 [2021-07-09 17:38:32,268 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 198 times [2021-07-09 17:38:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:32,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655439250] [2021-07-09 17:38:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655439250] [2021-07-09 17:38:32,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655439250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042561250] [2021-07-09 17:38:32,332 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 [2021-07-09 17:38:32,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:32,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:32,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042561250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001792518] [2021-07-09 17:38:32,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:32,568 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) [2021-07-09 17:38:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:32,854 INFO L93 Difference]: Finished difference Result 488 states and 1416 transitions. [2021-07-09 17:38:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:32,854 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 [2021-07-09 17:38:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:32,855 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:32,855 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:32,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 348. [2021-07-09 17:38:32,859 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) [2021-07-09 17:38:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1071 transitions. [2021-07-09 17:38:32,859 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1071 transitions. Word has length 20 [2021-07-09 17:38:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1071 transitions. [2021-07-09 17:38:32,860 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) [2021-07-09 17:38:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1071 transitions. [2021-07-09 17:38:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:32,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:32,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-07-09 17:38:33,061 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 199 times [2021-07-09 17:38:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424831371] [2021-07-09 17:38:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424831371] [2021-07-09 17:38:33,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424831371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148350563] [2021-07-09 17:38:33,124 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 [2021-07-09 17:38:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148350563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708178264] [2021-07-09 17:38:33,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:33,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:33,319 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) [2021-07-09 17:38:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:33,625 INFO L93 Difference]: Finished difference Result 465 states and 1377 transitions. [2021-07-09 17:38:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:33,625 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 [2021-07-09 17:38:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:33,626 INFO L225 Difference]: With dead ends: 465 [2021-07-09 17:38:33,626 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:38:33,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:38:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 337. [2021-07-09 17:38:33,629 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) [2021-07-09 17:38:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-07-09 17:38:33,630 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-07-09 17:38:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:33,630 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-07-09 17:38:33,630 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) [2021-07-09 17:38:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-07-09 17:38:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:33,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:33,631 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-07-09 17:38:33,831 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 200 times [2021-07-09 17:38:33,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284450529] [2021-07-09 17:38:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284450529] [2021-07-09 17:38:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284450529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519157050] [2021-07-09 17:38:33,888 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 [2021-07-09 17:38:33,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:33,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519157050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:34,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:34,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201964838] [2021-07-09 17:38:34,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:34,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:34,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:34,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:34,116 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) [2021-07-09 17:38:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,368 INFO L93 Difference]: Finished difference Result 405 states and 1214 transitions. [2021-07-09 17:38:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:34,369 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 [2021-07-09 17:38:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,369 INFO L225 Difference]: With dead ends: 405 [2021-07-09 17:38:34,369 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:38:34,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:38:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2021-07-09 17:38:34,373 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) [2021-07-09 17:38:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1044 transitions. [2021-07-09 17:38:34,373 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1044 transitions. Word has length 20 [2021-07-09 17:38:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,373 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1044 transitions. [2021-07-09 17:38:34,374 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) [2021-07-09 17:38:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1044 transitions. [2021-07-09 17:38:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:34,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,374 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:34,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:34,575 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:34,575 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 201 times [2021-07-09 17:38:34,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:34,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14794328] [2021-07-09 17:38:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14794328] [2021-07-09 17:38:34,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14794328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499835753] [2021-07-09 17:38:34,635 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 [2021-07-09 17:38:34,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:34,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499835753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:34,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805584785] [2021-07-09 17:38:34,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:34,878 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) [2021-07-09 17:38:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,182 INFO L93 Difference]: Finished difference Result 430 states and 1266 transitions. [2021-07-09 17:38:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:35,183 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 [2021-07-09 17:38:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,183 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:38:35,183 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:38:35,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:38:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-07-09 17:38:35,187 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) [2021-07-09 17:38:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2021-07-09 17:38:35,187 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2021-07-09 17:38:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,187 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2021-07-09 17:38:35,187 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) [2021-07-09 17:38:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2021-07-09 17:38:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:35,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,188 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-07-09 17:38:35,389 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 202 times [2021-07-09 17:38:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563974258] [2021-07-09 17:38:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:35,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563974258] [2021-07-09 17:38:35,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563974258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152661796] [2021-07-09 17:38:35,450 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 [2021-07-09 17:38:35,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:35,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152661796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:35,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:35,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127951085] [2021-07-09 17:38:35,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:35,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:35,655 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) [2021-07-09 17:38:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,835 INFO L93 Difference]: Finished difference Result 401 states and 1212 transitions. [2021-07-09 17:38:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:35,835 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 [2021-07-09 17:38:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,836 INFO L225 Difference]: With dead ends: 401 [2021-07-09 17:38:35,836 INFO L226 Difference]: Without dead ends: 401 [2021-07-09 17:38:35,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-09 17:38:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 336. [2021-07-09 17:38:35,839 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) [2021-07-09 17:38:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-07-09 17:38:35,839 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-07-09 17:38:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,840 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-07-09 17:38:35,840 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) [2021-07-09 17:38:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-07-09 17:38:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:35,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,840 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:36,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,041 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 203 times [2021-07-09 17:38:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088262699] [2021-07-09 17:38:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088262699] [2021-07-09 17:38:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088262699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068250592] [2021-07-09 17:38:36,105 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 [2021-07-09 17:38:36,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:36,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068250592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441162776] [2021-07-09 17:38:36,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:36,309 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) [2021-07-09 17:38:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:36,568 INFO L93 Difference]: Finished difference Result 475 states and 1405 transitions. [2021-07-09 17:38:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:36,568 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 [2021-07-09 17:38:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:36,569 INFO L225 Difference]: With dead ends: 475 [2021-07-09 17:38:36,569 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:38:36,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:38:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 346. [2021-07-09 17:38:36,573 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) [2021-07-09 17:38:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1079 transitions. [2021-07-09 17:38:36,574 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1079 transitions. Word has length 20 [2021-07-09 17:38:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:36,574 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1079 transitions. [2021-07-09 17:38:36,574 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) [2021-07-09 17:38:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1079 transitions. [2021-07-09 17:38:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:36,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:36,575 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:36,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-07-09 17:38:36,789 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 204 times [2021-07-09 17:38:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:36,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991161378] [2021-07-09 17:38:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991161378] [2021-07-09 17:38:36,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991161378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455909164] [2021-07-09 17:38:36,851 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 [2021-07-09 17:38:36,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455909164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:37,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:37,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527344101] [2021-07-09 17:38:37,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:37,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:37,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:37,031 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) [2021-07-09 17:38:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,271 INFO L93 Difference]: Finished difference Result 481 states and 1406 transitions. [2021-07-09 17:38:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:37,271 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 [2021-07-09 17:38:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,277 INFO L225 Difference]: With dead ends: 481 [2021-07-09 17:38:37,277 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:38:37,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:38:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 349. [2021-07-09 17:38:37,281 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) [2021-07-09 17:38:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-09 17:38:37,281 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-09 17:38:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-09 17:38:37,281 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) [2021-07-09 17:38:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-09 17:38:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:37,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,282 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,482 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 205 times [2021-07-09 17:38:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374517403] [2021-07-09 17:38:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374517403] [2021-07-09 17:38:37,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374517403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109235975] [2021-07-09 17:38:37,549 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 [2021-07-09 17:38:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:37,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109235975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:37,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594691155] [2021-07-09 17:38:37,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:37,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:37,727 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) [2021-07-09 17:38:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,957 INFO L93 Difference]: Finished difference Result 533 states and 1548 transitions. [2021-07-09 17:38:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:37,957 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 [2021-07-09 17:38:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,958 INFO L225 Difference]: With dead ends: 533 [2021-07-09 17:38:37,958 INFO L226 Difference]: Without dead ends: 533 [2021-07-09 17:38:37,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-09 17:38:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 352. [2021-07-09 17:38:37,962 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) [2021-07-09 17:38:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1096 transitions. [2021-07-09 17:38:37,962 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1096 transitions. Word has length 20 [2021-07-09 17:38:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,962 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1096 transitions. [2021-07-09 17:38:37,962 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) [2021-07-09 17:38:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1096 transitions. [2021-07-09 17:38:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:37,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,963 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2033,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,163 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 206 times [2021-07-09 17:38:38,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513780108] [2021-07-09 17:38:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513780108] [2021-07-09 17:38:38,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513780108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563522249] [2021-07-09 17:38:38,240 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 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 [2021-07-09 17:38:38,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:38,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563522249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459899054] [2021-07-09 17:38:38,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:38,474 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) [2021-07-09 17:38:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:38,748 INFO L93 Difference]: Finished difference Result 496 states and 1466 transitions. [2021-07-09 17:38:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:38,748 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 [2021-07-09 17:38:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:38,749 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:38:38,749 INFO L226 Difference]: Without dead ends: 496 [2021-07-09 17:38:38,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-09 17:38:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 349. [2021-07-09 17:38:38,753 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) [2021-07-09 17:38:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-09 17:38:38,754 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-09 17:38:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:38,754 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-09 17:38:38,754 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) [2021-07-09 17:38:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-09 17:38:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:38,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:38,754 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,955 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 207 times [2021-07-09 17:38:38,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362199206] [2021-07-09 17:38:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:39,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362199206] [2021-07-09 17:38:39,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362199206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860984454] [2021-07-09 17:38:39,021 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 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 [2021-07-09 17:38:39,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:39,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860984454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:39,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:39,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192872447] [2021-07-09 17:38:39,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:39,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:39,220 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) [2021-07-09 17:38:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:39,487 INFO L93 Difference]: Finished difference Result 521 states and 1500 transitions. [2021-07-09 17:38:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:39,487 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 [2021-07-09 17:38:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:39,488 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:38:39,488 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 17:38:39,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 17:38:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 353. [2021-07-09 17:38:39,492 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) [2021-07-09 17:38:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-07-09 17:38:39,493 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-07-09 17:38:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:39,493 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-07-09 17:38:39,493 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) [2021-07-09 17:38:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-07-09 17:38:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:39,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:39,493 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:39,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,694 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 208 times [2021-07-09 17:38:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:39,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726524472] [2021-07-09 17:38:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726524472] [2021-07-09 17:38:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726524472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454419322] [2021-07-09 17:38:39,770 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 [2021-07-09 17:38:39,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454419322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:39,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941977238] [2021-07-09 17:38:39,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:39,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:39,973 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) [2021-07-09 17:38:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:40,294 INFO L93 Difference]: Finished difference Result 527 states and 1521 transitions. [2021-07-09 17:38:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:40,294 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 [2021-07-09 17:38:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:40,295 INFO L225 Difference]: With dead ends: 527 [2021-07-09 17:38:40,295 INFO L226 Difference]: Without dead ends: 527 [2021-07-09 17:38:40,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-09 17:38:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 350. [2021-07-09 17:38:40,299 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) [2021-07-09 17:38:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1085 transitions. [2021-07-09 17:38:40,300 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1085 transitions. Word has length 20 [2021-07-09 17:38:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:40,300 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1085 transitions. [2021-07-09 17:38:40,300 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) [2021-07-09 17:38:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1085 transitions. [2021-07-09 17:38:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:40,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:40,300 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:40,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,501 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 209 times [2021-07-09 17:38:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:40,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086791613] [2021-07-09 17:38:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086791613] [2021-07-09 17:38:40,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086791613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894764576] [2021-07-09 17:38:40,567 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 [2021-07-09 17:38:40,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:40,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894764576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:40,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:40,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480175385] [2021-07-09 17:38:40,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:40,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:40,748 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) [2021-07-09 17:38:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:41,051 INFO L93 Difference]: Finished difference Result 457 states and 1366 transitions. [2021-07-09 17:38:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:41,051 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 [2021-07-09 17:38:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:41,052 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:38:41,052 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:38:41,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:38:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 351. [2021-07-09 17:38:41,056 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) [2021-07-09 17:38:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1087 transitions. [2021-07-09 17:38:41,056 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1087 transitions. Word has length 20 [2021-07-09 17:38:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:41,056 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1087 transitions. [2021-07-09 17:38:41,056 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) [2021-07-09 17:38:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1087 transitions. [2021-07-09 17:38:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:41,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:41,057 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:41,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,257 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 210 times [2021-07-09 17:38:41,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:41,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387744449] [2021-07-09 17:38:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:41,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387744449] [2021-07-09 17:38:41,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387744449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057271766] [2021-07-09 17:38:41,324 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 [2021-07-09 17:38:41,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:41,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057271766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:41,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394775248] [2021-07-09 17:38:41,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:41,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:41,523 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) [2021-07-09 17:38:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:41,830 INFO L93 Difference]: Finished difference Result 445 states and 1333 transitions. [2021-07-09 17:38:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:41,830 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 [2021-07-09 17:38:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:41,831 INFO L225 Difference]: With dead ends: 445 [2021-07-09 17:38:41,831 INFO L226 Difference]: Without dead ends: 445 [2021-07-09 17:38:41,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-09 17:38:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 340. [2021-07-09 17:38:41,835 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) [2021-07-09 17:38:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-09 17:38:41,835 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-09 17:38:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:41,835 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-09 17:38:41,835 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) [2021-07-09 17:38:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-09 17:38:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:41,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:41,836 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2079,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,036 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 211 times [2021-07-09 17:38:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191379498] [2021-07-09 17:38:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:42,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191379498] [2021-07-09 17:38:42,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191379498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109822505] [2021-07-09 17:38:42,102 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 [2021-07-09 17:38:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:42,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109822505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:42,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823269685] [2021-07-09 17:38:42,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:42,278 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) [2021-07-09 17:38:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,548 INFO L93 Difference]: Finished difference Result 400 states and 1211 transitions. [2021-07-09 17:38:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:42,549 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 [2021-07-09 17:38:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,549 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:38:42,549 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:38:42,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:38:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 337. [2021-07-09 17:38:42,553 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) [2021-07-09 17:38:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1038 transitions. [2021-07-09 17:38:42,553 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1038 transitions. Word has length 20 [2021-07-09 17:38:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1038 transitions. [2021-07-09 17:38:42,553 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) [2021-07-09 17:38:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1038 transitions. [2021-07-09 17:38:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:42,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,554 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:42,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,754 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 212 times [2021-07-09 17:38:42,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:42,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739788905] [2021-07-09 17:38:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:42,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739788905] [2021-07-09 17:38:42,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739788905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175395756] [2021-07-09 17:38:42,821 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 [2021-07-09 17:38:42,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175395756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:43,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744575915] [2021-07-09 17:38:43,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:43,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:43,017 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) [2021-07-09 17:38:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:43,322 INFO L93 Difference]: Finished difference Result 445 states and 1305 transitions. [2021-07-09 17:38:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:43,322 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 [2021-07-09 17:38:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:43,323 INFO L225 Difference]: With dead ends: 445 [2021-07-09 17:38:43,323 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:38:43,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:38:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 351. [2021-07-09 17:38:43,327 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) [2021-07-09 17:38:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1077 transitions. [2021-07-09 17:38:43,327 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1077 transitions. Word has length 20 [2021-07-09 17:38:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:43,327 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1077 transitions. [2021-07-09 17:38:43,327 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) [2021-07-09 17:38:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1077 transitions. [2021-07-09 17:38:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:43,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:43,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:43,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,533 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 213 times [2021-07-09 17:38:43,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:43,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255411909] [2021-07-09 17:38:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:43,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255411909] [2021-07-09 17:38:43,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255411909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578716244] [2021-07-09 17:38:43,614 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 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 [2021-07-09 17:38:43,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:43,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578716244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:38:43,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735385245] [2021-07-09 17:38:43,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:43,814 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) [2021-07-09 17:38:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,063 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-07-09 17:38:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:44,063 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 [2021-07-09 17:38:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,064 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:38:44,064 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:38:44,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:38:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2021-07-09 17:38:44,067 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) [2021-07-09 17:38:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-07-09 17:38:44,068 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,068 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-07-09 17:38:44,068 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) [2021-07-09 17:38:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-07-09 17:38:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:44,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,069 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-07-09 17:38:44,269 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 214 times [2021-07-09 17:38:44,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774417690] [2021-07-09 17:38:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774417690] [2021-07-09 17:38:44,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774417690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617546272] [2021-07-09 17:38:44,331 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 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 [2021-07-09 17:38:44,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617546272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:44,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:44,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700482575] [2021-07-09 17:38:44,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:44,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:44,556 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) [2021-07-09 17:38:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,832 INFO L93 Difference]: Finished difference Result 420 states and 1261 transitions. [2021-07-09 17:38:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:44,832 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 [2021-07-09 17:38:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,833 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:38:44,833 INFO L226 Difference]: Without dead ends: 420 [2021-07-09 17:38:44,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-09 17:38:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 336. [2021-07-09 17:38:44,836 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) [2021-07-09 17:38:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-07-09 17:38:44,837 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-07-09 17:38:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,837 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-07-09 17:38:44,837 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) [2021-07-09 17:38:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-07-09 17:38:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:44,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,838 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:45,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-07-09 17:38:45,038 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 215 times [2021-07-09 17:38:45,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:45,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595058318] [2021-07-09 17:38:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595058318] [2021-07-09 17:38:45,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595058318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030242617] [2021-07-09 17:38:45,096 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 [2021-07-09 17:38:45,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030242617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:45,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664394757] [2021-07-09 17:38:45,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:45,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:45,268 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) [2021-07-09 17:38:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:45,461 INFO L93 Difference]: Finished difference Result 394 states and 1182 transitions. [2021-07-09 17:38:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:45,461 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 [2021-07-09 17:38:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:45,462 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:38:45,462 INFO L226 Difference]: Without dead ends: 382 [2021-07-09 17:38:45,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-09 17:38:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 340. [2021-07-09 17:38:45,467 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) [2021-07-09 17:38:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1044 transitions. [2021-07-09 17:38:45,467 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1044 transitions. Word has length 20 [2021-07-09 17:38:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:45,467 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1044 transitions. [2021-07-09 17:38:45,468 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) [2021-07-09 17:38:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1044 transitions. [2021-07-09 17:38:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:45,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:45,468 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:45,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:45,685 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 216 times [2021-07-09 17:38:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60779868] [2021-07-09 17:38:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:45,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60779868] [2021-07-09 17:38:45,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60779868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076906511] [2021-07-09 17:38:45,746 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 [2021-07-09 17:38:45,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076906511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:45,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137026433] [2021-07-09 17:38:45,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:45,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:45,922 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) [2021-07-09 17:38:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,121 INFO L93 Difference]: Finished difference Result 419 states and 1234 transitions. [2021-07-09 17:38:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:46,121 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 [2021-07-09 17:38:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,122 INFO L225 Difference]: With dead ends: 419 [2021-07-09 17:38:46,122 INFO L226 Difference]: Without dead ends: 413 [2021-07-09 17:38:46,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-09 17:38:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 350. [2021-07-09 17:38:46,125 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) [2021-07-09 17:38:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1071 transitions. [2021-07-09 17:38:46,126 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1071 transitions. Word has length 20 [2021-07-09 17:38:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,126 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1071 transitions. [2021-07-09 17:38:46,126 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) [2021-07-09 17:38:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1071 transitions. [2021-07-09 17:38:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:46,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,126 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2125 [2021-07-09 17:38:46,327 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,327 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 217 times [2021-07-09 17:38:46,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92691203] [2021-07-09 17:38:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:46,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92691203] [2021-07-09 17:38:46,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92691203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753651613] [2021-07-09 17:38:46,383 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 [2021-07-09 17:38:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753651613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:46,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:46,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118434238] [2021-07-09 17:38:46,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:46,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:46,572 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) [2021-07-09 17:38:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,744 INFO L93 Difference]: Finished difference Result 390 states and 1180 transitions. [2021-07-09 17:38:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:46,744 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 [2021-07-09 17:38:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,745 INFO L225 Difference]: With dead ends: 390 [2021-07-09 17:38:46,745 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:38:46,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:38:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2021-07-09 17:38:46,748 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) [2021-07-09 17:38:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1039 transitions. [2021-07-09 17:38:46,748 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1039 transitions. Word has length 20 [2021-07-09 17:38:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,748 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1039 transitions. [2021-07-09 17:38:46,748 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) [2021-07-09 17:38:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1039 transitions. [2021-07-09 17:38:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:46,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,753 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,973 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 218 times [2021-07-09 17:38:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418168227] [2021-07-09 17:38:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418168227] [2021-07-09 17:38:47,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418168227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961932477] [2021-07-09 17:38:47,030 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 [2021-07-09 17:38:47,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961932477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:47,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974710291] [2021-07-09 17:38:47,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:47,201 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) [2021-07-09 17:38:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:47,412 INFO L93 Difference]: Finished difference Result 425 states and 1249 transitions. [2021-07-09 17:38:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:47,412 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 [2021-07-09 17:38:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:47,413 INFO L225 Difference]: With dead ends: 425 [2021-07-09 17:38:47,413 INFO L226 Difference]: Without dead ends: 419 [2021-07-09 17:38:47,413 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 [2021-07-09 17:38:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-09 17:38:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 352. [2021-07-09 17:38:47,417 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) [2021-07-09 17:38:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1078 transitions. [2021-07-09 17:38:47,418 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1078 transitions. Word has length 20 [2021-07-09 17:38:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:47,418 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1078 transitions. [2021-07-09 17:38:47,418 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) [2021-07-09 17:38:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1078 transitions. [2021-07-09 17:38:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:47,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:47,419 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:47,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2135,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:47,637 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 219 times [2021-07-09 17:38:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:47,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963511839] [2021-07-09 17:38:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963511839] [2021-07-09 17:38:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963511839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745496940] [2021-07-09 17:38:47,692 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 [2021-07-09 17:38:47,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745496940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:47,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:47,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410882436] [2021-07-09 17:38:47,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:47,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:47,849 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) [2021-07-09 17:38:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:48,071 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2021-07-09 17:38:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:48,071 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 [2021-07-09 17:38:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:48,072 INFO L225 Difference]: With dead ends: 425 [2021-07-09 17:38:48,072 INFO L226 Difference]: Without dead ends: 425 [2021-07-09 17:38:48,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-09 17:38:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2021-07-09 17:38:48,075 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) [2021-07-09 17:38:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1073 transitions. [2021-07-09 17:38:48,076 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1073 transitions. Word has length 20 [2021-07-09 17:38:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:48,076 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1073 transitions. [2021-07-09 17:38:48,076 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) [2021-07-09 17:38:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1073 transitions. [2021-07-09 17:38:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:48,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:48,077 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:48,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,277 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 220 times [2021-07-09 17:38:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240800702] [2021-07-09 17:38:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240800702] [2021-07-09 17:38:48,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240800702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067660501] [2021-07-09 17:38:48,333 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 [2021-07-09 17:38:48,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067660501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:48,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:48,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78662202] [2021-07-09 17:38:48,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:48,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:48,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:48,484 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) [2021-07-09 17:38:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:48,730 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-07-09 17:38:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:48,731 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 [2021-07-09 17:38:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:48,731 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:38:48,731 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:38:48,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:38:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 335. [2021-07-09 17:38:48,735 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) [2021-07-09 17:38:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-07-09 17:38:48,735 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-07-09 17:38:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:48,735 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-07-09 17:38:48,735 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) [2021-07-09 17:38:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-07-09 17:38:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:48,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:48,736 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:48,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,936 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 221 times [2021-07-09 17:38:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:48,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836437244] [2021-07-09 17:38:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836437244] [2021-07-09 17:38:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836437244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983631106] [2021-07-09 17:38:48,987 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 [2021-07-09 17:38:49,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:49,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983631106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:49,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:49,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762582049] [2021-07-09 17:38:49,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:49,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:49,135 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) [2021-07-09 17:38:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,323 INFO L93 Difference]: Finished difference Result 458 states and 1340 transitions. [2021-07-09 17:38:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:49,323 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 [2021-07-09 17:38:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,324 INFO L225 Difference]: With dead ends: 458 [2021-07-09 17:38:49,324 INFO L226 Difference]: Without dead ends: 440 [2021-07-09 17:38:49,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-09 17:38:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2021-07-09 17:38:49,327 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) [2021-07-09 17:38:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-07-09 17:38:49,328 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,328 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-07-09 17:38:49,328 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) [2021-07-09 17:38:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-07-09 17:38:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:49,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:49,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-07-09 17:38:49,529 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 222 times [2021-07-09 17:38:49,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:49,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063680448] [2021-07-09 17:38:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063680448] [2021-07-09 17:38:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063680448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451012080] [2021-07-09 17:38:49,581 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 [2021-07-09 17:38:49,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451012080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:49,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:49,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783313809] [2021-07-09 17:38:49,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:49,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:49,762 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) [2021-07-09 17:38:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,944 INFO L93 Difference]: Finished difference Result 454 states and 1332 transitions. [2021-07-09 17:38:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:49,944 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 [2021-07-09 17:38:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,945 INFO L225 Difference]: With dead ends: 454 [2021-07-09 17:38:49,945 INFO L226 Difference]: Without dead ends: 442 [2021-07-09 17:38:49,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-09 17:38:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-07-09 17:38:49,948 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) [2021-07-09 17:38:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-07-09 17:38:49,949 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-07-09 17:38:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,949 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-07-09 17:38:49,949 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) [2021-07-09 17:38:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-07-09 17:38:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:49,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,950 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,150 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 223 times [2021-07-09 17:38:50,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514561690] [2021-07-09 17:38:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514561690] [2021-07-09 17:38:50,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514561690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100928107] [2021-07-09 17:38:50,212 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 [2021-07-09 17:38:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100928107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:50,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729327884] [2021-07-09 17:38:50,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:50,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:50,387 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) [2021-07-09 17:38:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:50,712 INFO L93 Difference]: Finished difference Result 479 states and 1384 transitions. [2021-07-09 17:38:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:50,713 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 [2021-07-09 17:38:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:50,713 INFO L225 Difference]: With dead ends: 479 [2021-07-09 17:38:50,713 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 17:38:50,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 17:38:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 351. [2021-07-09 17:38:50,717 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) [2021-07-09 17:38:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-07-09 17:38:50,718 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:50,718 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-07-09 17:38:50,718 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) [2021-07-09 17:38:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-07-09 17:38:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:50,719 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-07-09 17:38:50,919 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 224 times [2021-07-09 17:38:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310286900] [2021-07-09 17:38:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310286900] [2021-07-09 17:38:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310286900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599682930] [2021-07-09 17:38:50,972 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 [2021-07-09 17:38:51,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599682930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:51,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:38:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424261148] [2021-07-09 17:38:51,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:51,146 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) [2021-07-09 17:38:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,337 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-07-09 17:38:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:51,337 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 [2021-07-09 17:38:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,338 INFO L225 Difference]: With dead ends: 450 [2021-07-09 17:38:51,338 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 17:38:51,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 17:38:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 337. [2021-07-09 17:38:51,341 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) [2021-07-09 17:38:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-09 17:38:51,342 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-09 17:38:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,342 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-09 17:38:51,342 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) [2021-07-09 17:38:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-09 17:38:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:51,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,342 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:51,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2164,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:51,543 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 225 times [2021-07-09 17:38:51,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:51,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229806658] [2021-07-09 17:38:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:51,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229806658] [2021-07-09 17:38:51,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229806658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864147486] [2021-07-09 17:38:51,590 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 [2021-07-09 17:38:51,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864147486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:51,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:51,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491503952] [2021-07-09 17:38:51,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:51,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:51,748 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) [2021-07-09 17:38:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,918 INFO L93 Difference]: Finished difference Result 391 states and 1173 transitions. [2021-07-09 17:38:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:51,919 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 [2021-07-09 17:38:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,919 INFO L225 Difference]: With dead ends: 391 [2021-07-09 17:38:51,919 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:38:51,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:38:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-07-09 17:38:51,923 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) [2021-07-09 17:38:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-07-09 17:38:51,923 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-07-09 17:38:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,923 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-07-09 17:38:51,923 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) [2021-07-09 17:38:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-07-09 17:38:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:51,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,924 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2168,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,129 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 226 times [2021-07-09 17:38:52,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607003228] [2021-07-09 17:38:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607003228] [2021-07-09 17:38:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607003228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532177901] [2021-07-09 17:38:52,179 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 [2021-07-09 17:38:52,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532177901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:52,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348264562] [2021-07-09 17:38:52,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:52,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:52,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:52,333 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) [2021-07-09 17:38:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:52,528 INFO L93 Difference]: Finished difference Result 416 states and 1225 transitions. [2021-07-09 17:38:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:52,528 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 [2021-07-09 17:38:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:52,529 INFO L225 Difference]: With dead ends: 416 [2021-07-09 17:38:52,529 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 17:38:52,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 17:38:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 351. [2021-07-09 17:38:52,532 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) [2021-07-09 17:38:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-07-09 17:38:52,533 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-07-09 17:38:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:52,533 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-07-09 17:38:52,533 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) [2021-07-09 17:38:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-07-09 17:38:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:52,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:52,533 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,734 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 227 times [2021-07-09 17:38:52,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190197056] [2021-07-09 17:38:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190197056] [2021-07-09 17:38:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190197056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359985357] [2021-07-09 17:38:52,785 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 [2021-07-09 17:38:52,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:52,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359985357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:52,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519200256] [2021-07-09 17:38:52,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:52,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:52,938 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) [2021-07-09 17:38:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,083 INFO L93 Difference]: Finished difference Result 387 states and 1171 transitions. [2021-07-09 17:38:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:53,083 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 [2021-07-09 17:38:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,084 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:38:53,084 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:38:53,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:38:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2021-07-09 17:38:53,087 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) [2021-07-09 17:38:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-07-09 17:38:53,087 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,088 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-07-09 17:38:53,088 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) [2021-07-09 17:38:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-07-09 17:38:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:53,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,088 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-07-09 17:38:53,289 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 228 times [2021-07-09 17:38:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587907400] [2021-07-09 17:38:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587907400] [2021-07-09 17:38:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587907400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081634353] [2021-07-09 17:38:53,343 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 [2021-07-09 17:38:53,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081634353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:53,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:53,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910163297] [2021-07-09 17:38:53,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:53,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:53,491 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) [2021-07-09 17:38:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,730 INFO L93 Difference]: Finished difference Result 420 states and 1235 transitions. [2021-07-09 17:38:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:53,730 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 [2021-07-09 17:38:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,731 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:38:53,731 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:38:53,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:38:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2021-07-09 17:38:53,734 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) [2021-07-09 17:38:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1079 transitions. [2021-07-09 17:38:53,735 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1079 transitions. Word has length 20 [2021-07-09 17:38:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,735 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1079 transitions. [2021-07-09 17:38:53,735 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) [2021-07-09 17:38:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1079 transitions. [2021-07-09 17:38:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:53,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,736 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:53,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-07-09 17:38:53,936 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 229 times [2021-07-09 17:38:53,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:53,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46057344] [2021-07-09 17:38:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46057344] [2021-07-09 17:38:53,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46057344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905565104] [2021-07-09 17:38:53,988 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 [2021-07-09 17:38:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905565104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286171531] [2021-07-09 17:38:54,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:54,128 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) [2021-07-09 17:38:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:54,292 INFO L93 Difference]: Finished difference Result 420 states and 1241 transitions. [2021-07-09 17:38:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:54,292 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 [2021-07-09 17:38:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:54,293 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:38:54,293 INFO L226 Difference]: Without dead ends: 420 [2021-07-09 17:38:54,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-09 17:38:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 351. [2021-07-09 17:38:54,297 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) [2021-07-09 17:38:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1074 transitions. [2021-07-09 17:38:54,297 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1074 transitions. Word has length 20 [2021-07-09 17:38:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:54,298 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1074 transitions. [2021-07-09 17:38:54,298 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) [2021-07-09 17:38:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1074 transitions. [2021-07-09 17:38:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:54,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:54,298 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,499 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 230 times [2021-07-09 17:38:54,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025034525] [2021-07-09 17:38:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025034525] [2021-07-09 17:38:54,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025034525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737791979] [2021-07-09 17:38:54,556 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 [2021-07-09 17:38:54,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:54,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737791979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:38:54,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733476952] [2021-07-09 17:38:54,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:38:54,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:38:54,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:38:54,725 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) [2021-07-09 17:38:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:54,900 INFO L93 Difference]: Finished difference Result 395 states and 1191 transitions. [2021-07-09 17:38:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:54,901 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 [2021-07-09 17:38:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:54,901 INFO L225 Difference]: With dead ends: 395 [2021-07-09 17:38:54,901 INFO L226 Difference]: Without dead ends: 395 [2021-07-09 17:38:54,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-09 17:38:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 337. [2021-07-09 17:38:54,905 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) [2021-07-09 17:38:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-09 17:38:54,905 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-09 17:38:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:54,905 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-09 17:38:54,905 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) [2021-07-09 17:38:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-09 17:38:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:54,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:54,906 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,107 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 915807584, now seen corresponding path program 231 times [2021-07-09 17:38:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922571623] [2021-07-09 17:38:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:55,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922571623] [2021-07-09 17:38:55,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922571623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020117138] [2021-07-09 17:38:55,146 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 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 [2021-07-09 17:38:55,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:55,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:55,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:38:55,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,261 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 13 treesize of output 9 [2021-07-09 17:38:55,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,276 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:38:55,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:55,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:38:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020117138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:38:55,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930352513] [2021-07-09 17:38:55,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:55,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:55,319 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) [2021-07-09 17:38:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:55,512 INFO L93 Difference]: Finished difference Result 436 states and 1297 transitions. [2021-07-09 17:38:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:55,512 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 [2021-07-09 17:38:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:55,513 INFO L225 Difference]: With dead ends: 436 [2021-07-09 17:38:55,513 INFO L226 Difference]: Without dead ends: 384 [2021-07-09 17:38:55,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-09 17:38:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 332. [2021-07-09 17:38:55,516 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) [2021-07-09 17:38:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-07-09 17:38:55,516 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-07-09 17:38:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:55,516 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-07-09 17:38:55,516 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) [2021-07-09 17:38:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-07-09 17:38:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:55,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:55,517 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-07-09 17:38:55,718 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 232 times [2021-07-09 17:38:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599913357] [2021-07-09 17:38:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599913357] [2021-07-09 17:38:55,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599913357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491171490] [2021-07-09 17:38:55,774 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 [2021-07-09 17:38:55,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:55,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,921 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 12 treesize of output 8 [2021-07-09 17:38:55,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,929 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:38:55,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:55,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-07-09 17:38:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491171490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:55,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652268507] [2021-07-09 17:38:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:55,940 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) [2021-07-09 17:38:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,081 INFO L93 Difference]: Finished difference Result 419 states and 1237 transitions. [2021-07-09 17:38:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:56,082 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 [2021-07-09 17:38:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,082 INFO L225 Difference]: With dead ends: 419 [2021-07-09 17:38:56,082 INFO L226 Difference]: Without dead ends: 419 [2021-07-09 17:38:56,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-09 17:38:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-07-09 17:38:56,086 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) [2021-07-09 17:38:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1041 transitions. [2021-07-09 17:38:56,086 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1041 transitions. Word has length 20 [2021-07-09 17:38:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,086 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1041 transitions. [2021-07-09 17:38:56,086 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) [2021-07-09 17:38:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1041 transitions. [2021-07-09 17:38:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:56,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,087 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:56,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-07-09 17:38:56,288 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 233 times [2021-07-09 17:38:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:56,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566341836] [2021-07-09 17:38:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566341836] [2021-07-09 17:38:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566341836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858909278] [2021-07-09 17:38:56,341 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 [2021-07-09 17:38:56,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:56,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:56,464 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 12 treesize of output 8 [2021-07-09 17:38:56,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,471 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:38:56,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:56,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-09 17:38:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858909278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:56,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:38:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379696906] [2021-07-09 17:38:56,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:38:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:38:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:38:56,494 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) [2021-07-09 17:38:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,624 INFO L93 Difference]: Finished difference Result 471 states and 1358 transitions. [2021-07-09 17:38:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:56,624 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 [2021-07-09 17:38:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,625 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:38:56,625 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:38:56,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:38:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 345. [2021-07-09 17:38:56,629 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) [2021-07-09 17:38:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1052 transitions. [2021-07-09 17:38:56,629 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1052 transitions. Word has length 20 [2021-07-09 17:38:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,629 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1052 transitions. [2021-07-09 17:38:56,629 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) [2021-07-09 17:38:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1052 transitions. [2021-07-09 17:38:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:56,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:56,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2211 [2021-07-09 17:38:56,830 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 234 times [2021-07-09 17:38:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:56,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455121020] [2021-07-09 17:38:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455121020] [2021-07-09 17:38:56,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455121020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621106420] [2021-07-09 17:38:56,882 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 [2021-07-09 17:38:56,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:57,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:38:57,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:57,012 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-07-09 17:38:57,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:57,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-07-09 17:38:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621106420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:57,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:38:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172187534] [2021-07-09 17:38:57,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:38:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:38:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:38:57,034 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) [2021-07-09 17:38:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,173 INFO L93 Difference]: Finished difference Result 428 states and 1255 transitions. [2021-07-09 17:38:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:57,173 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 [2021-07-09 17:38:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,173 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:38:57,174 INFO L226 Difference]: Without dead ends: 422 [2021-07-09 17:38:57,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-07-09 17:38:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 337. [2021-07-09 17:38:57,177 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) [2021-07-09 17:38:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1028 transitions. [2021-07-09 17:38:57,177 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1028 transitions. Word has length 20 [2021-07-09 17:38:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,177 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1028 transitions. [2021-07-09 17:38:57,177 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) [2021-07-09 17:38:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1028 transitions. [2021-07-09 17:38:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:57,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,178 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,393 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 235 times [2021-07-09 17:38:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404577270] [2021-07-09 17:38:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404577270] [2021-07-09 17:38:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404577270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61412144] [2021-07-09 17:38:57,454 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 [2021-07-09 17:38:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61412144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:57,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:57,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037671352] [2021-07-09 17:38:57,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:57,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:57,613 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) [2021-07-09 17:38:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,760 INFO L93 Difference]: Finished difference Result 397 states and 1171 transitions. [2021-07-09 17:38:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:57,760 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 [2021-07-09 17:38:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,761 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:38:57,761 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:38:57,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:38:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2021-07-09 17:38:57,764 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) [2021-07-09 17:38:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1050 transitions. [2021-07-09 17:38:57,765 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1050 transitions. Word has length 20 [2021-07-09 17:38:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,765 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1050 transitions. [2021-07-09 17:38:57,765 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) [2021-07-09 17:38:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1050 transitions. [2021-07-09 17:38:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:57,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,966 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 236 times [2021-07-09 17:38:57,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256051239] [2021-07-09 17:38:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256051239] [2021-07-09 17:38:58,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256051239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179626624] [2021-07-09 17:38:58,022 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 [2021-07-09 17:38:58,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:58,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179626624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:38:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259192850] [2021-07-09 17:38:58,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:58,186 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) [2021-07-09 17:38:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:58,402 INFO L93 Difference]: Finished difference Result 403 states and 1178 transitions. [2021-07-09 17:38:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:58,402 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 [2021-07-09 17:38:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:58,403 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:38:58,403 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:38:58,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:38:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-07-09 17:38:58,406 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) [2021-07-09 17:38:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2021-07-09 17:38:58,407 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2021-07-09 17:38:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:58,407 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2021-07-09 17:38:58,407 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) [2021-07-09 17:38:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2021-07-09 17:38:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:58,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:58,407 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:58,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-07-09 17:38:58,608 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 237 times [2021-07-09 17:38:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:58,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124475617] [2021-07-09 17:38:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124475617] [2021-07-09 17:38:58,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124475617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182827455] [2021-07-09 17:38:58,665 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 [2021-07-09 17:38:58,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182827455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:38:58,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771186707] [2021-07-09 17:38:58,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:38:58,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:38:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:38:58,819 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) [2021-07-09 17:38:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,020 INFO L93 Difference]: Finished difference Result 361 states and 1083 transitions. [2021-07-09 17:38:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:59,020 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 [2021-07-09 17:38:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,021 INFO L225 Difference]: With dead ends: 361 [2021-07-09 17:38:59,021 INFO L226 Difference]: Without dead ends: 349 [2021-07-09 17:38:59,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-09 17:38:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 332. [2021-07-09 17:38:59,024 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) [2021-07-09 17:38:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-07-09 17:38:59,025 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-07-09 17:38:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,025 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-07-09 17:38:59,025 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) [2021-07-09 17:38:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-07-09 17:38:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:59,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,025 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-09 17:38:59,226 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -144970506, now seen corresponding path program 238 times [2021-07-09 17:38:59,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758263381] [2021-07-09 17:38:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:59,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758263381] [2021-07-09 17:38:59,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758263381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383734224] [2021-07-09 17:38:59,271 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 [2021-07-09 17:38:59,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:38:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:59,382 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 [2021-07-09 17:38:59,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:38:59,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:59,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:38:59,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,414 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-07-09 17:38:59,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:59,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-09 17:38:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383734224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:59,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:38:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104630832] [2021-07-09 17:38:59,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:59,474 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) [2021-07-09 17:38:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,743 INFO L93 Difference]: Finished difference Result 522 states and 1535 transitions. [2021-07-09 17:38:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:59,743 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 [2021-07-09 17:38:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,744 INFO L225 Difference]: With dead ends: 522 [2021-07-09 17:38:59,744 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:38:59,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:38:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 337. [2021-07-09 17:38:59,747 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) [2021-07-09 17:38:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-07-09 17:38:59,748 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-07-09 17:38:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,748 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-07-09 17:38:59,748 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) [2021-07-09 17:38:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-07-09 17:38:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:59,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,749 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-07-09 17:38:59,949 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 239 times [2021-07-09 17:38:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91736483] [2021-07-09 17:38:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91736483] [2021-07-09 17:39:00,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91736483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133911538] [2021-07-09 17:39:00,004 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 [2021-07-09 17:39:00,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:00,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:00,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:00,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:00,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,182 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-07-09 17:39:00,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-07-09 17:39:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:00,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,226 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-09 17:39:00,226 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:00,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:00,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-07-09 17:39:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133911538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:00,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946339148] [2021-07-09 17:39:00,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:00,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:00,277 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) [2021-07-09 17:39:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:00,439 INFO L93 Difference]: Finished difference Result 577 states and 1670 transitions. [2021-07-09 17:39:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:00,439 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 [2021-07-09 17:39:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:00,440 INFO L225 Difference]: With dead ends: 577 [2021-07-09 17:39:00,440 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 17:39:00,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 17:39:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 349. [2021-07-09 17:39:00,446 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) [2021-07-09 17:39:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-07-09 17:39:00,447 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-07-09 17:39:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:00,447 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-07-09 17:39:00,447 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) [2021-07-09 17:39:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-07-09 17:39:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:00,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:00,448 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:00,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-07-09 17:39:00,668 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 240 times [2021-07-09 17:39:00,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:00,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821808344] [2021-07-09 17:39:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821808344] [2021-07-09 17:39:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821808344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541533305] [2021-07-09 17:39:00,720 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 [2021-07-09 17:39:00,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:00,854 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 [2021-07-09 17:39:00,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,893 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-07-09 17:39:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:00,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:00,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:00,920 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:00,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:00,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-09 17:39:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541533305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:00,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139102504] [2021-07-09 17:39:00,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:00,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:00,965 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) [2021-07-09 17:39:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,118 INFO L93 Difference]: Finished difference Result 629 states and 1791 transitions. [2021-07-09 17:39:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:01,118 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 [2021-07-09 17:39:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,119 INFO L225 Difference]: With dead ends: 629 [2021-07-09 17:39:01,119 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 17:39:01,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 17:39:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 355. [2021-07-09 17:39:01,123 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) [2021-07-09 17:39:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-07-09 17:39:01,124 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-07-09 17:39:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,124 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-07-09 17:39:01,124 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) [2021-07-09 17:39:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-07-09 17:39:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:01,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,125 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,325 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 241 times [2021-07-09 17:39:01,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261216760] [2021-07-09 17:39:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261216760] [2021-07-09 17:39:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261216760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645127553] [2021-07-09 17:39:01,379 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 [2021-07-09 17:39:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:01,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,509 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 5 treesize of output 3 [2021-07-09 17:39:01,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:01,530 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 [2021-07-09 17:39:01,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,533 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 13 treesize of output 9 [2021-07-09 17:39:01,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,555 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:01,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:01,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645127553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:01,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284725960] [2021-07-09 17:39:01,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:01,599 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) [2021-07-09 17:39:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,760 INFO L93 Difference]: Finished difference Result 586 states and 1682 transitions. [2021-07-09 17:39:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:01,760 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 [2021-07-09 17:39:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,761 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:39:01,761 INFO L226 Difference]: Without dead ends: 580 [2021-07-09 17:39:01,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-09 17:39:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 353. [2021-07-09 17:39:01,765 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) [2021-07-09 17:39:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-07-09 17:39:01,765 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-07-09 17:39:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,765 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-07-09 17:39:01,765 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) [2021-07-09 17:39:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-07-09 17:39:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:01,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,766 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,989 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 242 times [2021-07-09 17:39:01,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140879085] [2021-07-09 17:39:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:02,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140879085] [2021-07-09 17:39:02,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140879085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900680036] [2021-07-09 17:39:02,030 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 [2021-07-09 17:39:02,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:02,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:02,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:02,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:39:02,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,187 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-07-09 17:39:02,188 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 12 treesize of output 8 [2021-07-09 17:39:02,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:02,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:02,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:39:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900680036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:02,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:39:02,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552269839] [2021-07-09 17:39:02,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:02,256 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) [2021-07-09 17:39:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:02,482 INFO L93 Difference]: Finished difference Result 469 states and 1402 transitions. [2021-07-09 17:39:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:02,482 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 [2021-07-09 17:39:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:02,483 INFO L225 Difference]: With dead ends: 469 [2021-07-09 17:39:02,483 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:39:02,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:39:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-07-09 17:39:02,487 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) [2021-07-09 17:39:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2021-07-09 17:39:02,487 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2021-07-09 17:39:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:02,488 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2021-07-09 17:39:02,488 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) [2021-07-09 17:39:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2021-07-09 17:39:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:02,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:02,489 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:02,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-07-09 17:39:02,702 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 243 times [2021-07-09 17:39:02,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:02,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774229837] [2021-07-09 17:39:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774229837] [2021-07-09 17:39:02,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774229837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550018394] [2021-07-09 17:39:02,756 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 [2021-07-09 17:39:02,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:02,893 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 [2021-07-09 17:39:02,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,933 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-07-09 17:39:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:02,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,942 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 13 treesize of output 9 [2021-07-09 17:39:02,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,966 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:02,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:02,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-07-09 17:39:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550018394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:03,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:39:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83602750] [2021-07-09 17:39:03,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:39:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:39:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:03,020 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) [2021-07-09 17:39:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:03,203 INFO L93 Difference]: Finished difference Result 530 states and 1548 transitions. [2021-07-09 17:39:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:03,204 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 [2021-07-09 17:39:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:03,204 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:39:03,204 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:39:03,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:39:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 337. [2021-07-09 17:39:03,208 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) [2021-07-09 17:39:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-07-09 17:39:03,208 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-07-09 17:39:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:03,209 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-07-09 17:39:03,209 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) [2021-07-09 17:39:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-07-09 17:39:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:03,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:03,209 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:03,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2311,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,410 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 244 times [2021-07-09 17:39:03,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:03,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269924299] [2021-07-09 17:39:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269924299] [2021-07-09 17:39:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269924299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519842854] [2021-07-09 17:39:03,485 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 [2021-07-09 17:39:03,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:03,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,649 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-09 17:39:03,651 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 12 treesize of output 8 [2021-07-09 17:39:03,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:03,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,673 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:03,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:03,674 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-07-09 17:39:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519842854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:03,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867160548] [2021-07-09 17:39:03,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:03,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:03,723 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) [2021-07-09 17:39:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:03,863 INFO L93 Difference]: Finished difference Result 497 states and 1466 transitions. [2021-07-09 17:39:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:03,863 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 [2021-07-09 17:39:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:03,864 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:39:03,864 INFO L226 Difference]: Without dead ends: 497 [2021-07-09 17:39:03,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-09 17:39:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 340. [2021-07-09 17:39:03,868 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) [2021-07-09 17:39:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-07-09 17:39:03,869 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-07-09 17:39:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:03,869 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-07-09 17:39:03,869 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) [2021-07-09 17:39:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-07-09 17:39:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:03,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:03,870 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-07-09 17:39:04,070 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 245 times [2021-07-09 17:39:04,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605268090] [2021-07-09 17:39:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:04,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605268090] [2021-07-09 17:39:04,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605268090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695169937] [2021-07-09 17:39:04,126 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 [2021-07-09 17:39:04,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:04,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:04,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,256 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 12 treesize of output 8 [2021-07-09 17:39:04,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:04,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,280 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 13 treesize of output 9 [2021-07-09 17:39:04,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,302 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:04,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:04,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695169937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:04,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461950700] [2021-07-09 17:39:04,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:04,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:04,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:04,349 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) [2021-07-09 17:39:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:04,469 INFO L93 Difference]: Finished difference Result 464 states and 1389 transitions. [2021-07-09 17:39:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:04,469 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 [2021-07-09 17:39:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:04,470 INFO L225 Difference]: With dead ends: 464 [2021-07-09 17:39:04,470 INFO L226 Difference]: Without dead ends: 464 [2021-07-09 17:39:04,470 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 [2021-07-09 17:39:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-09 17:39:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 331. [2021-07-09 17:39:04,474 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) [2021-07-09 17:39:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1011 transitions. [2021-07-09 17:39:04,474 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1011 transitions. Word has length 20 [2021-07-09 17:39:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:04,474 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1011 transitions. [2021-07-09 17:39:04,474 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) [2021-07-09 17:39:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1011 transitions. [2021-07-09 17:39:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:04,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:04,475 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2333 [2021-07-09 17:39:04,675 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 246 times [2021-07-09 17:39:04,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262792589] [2021-07-09 17:39:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262792589] [2021-07-09 17:39:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262792589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444386742] [2021-07-09 17:39:04,737 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 [2021-07-09 17:39:04,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:04,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:04,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,889 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 [2021-07-09 17:39:04,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:04,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,914 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:04,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:04,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444386742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209282080] [2021-07-09 17:39:04,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:04,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:04,990 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) [2021-07-09 17:39:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:05,224 INFO L93 Difference]: Finished difference Result 574 states and 1673 transitions. [2021-07-09 17:39:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:05,224 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 [2021-07-09 17:39:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:05,225 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:39:05,225 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:39:05,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:39:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 339. [2021-07-09 17:39:05,229 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) [2021-07-09 17:39:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1047 transitions. [2021-07-09 17:39:05,230 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1047 transitions. Word has length 20 [2021-07-09 17:39:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:05,230 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1047 transitions. [2021-07-09 17:39:05,230 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) [2021-07-09 17:39:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1047 transitions. [2021-07-09 17:39:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:05,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:05,230 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:05,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-07-09 17:39:05,431 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 247 times [2021-07-09 17:39:05,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:05,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757987501] [2021-07-09 17:39:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757987501] [2021-07-09 17:39:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757987501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250123663] [2021-07-09 17:39:05,515 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 [2021-07-09 17:39:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:05,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:05,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,723 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-07-09 17:39:05,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:05,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:05,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,747 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:05,747 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:05,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:05,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-07-09 17:39:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250123663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:05,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439010403] [2021-07-09 17:39:05,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:05,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:05,823 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) [2021-07-09 17:39:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,021 INFO L93 Difference]: Finished difference Result 560 states and 1622 transitions. [2021-07-09 17:39:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:06,022 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 [2021-07-09 17:39:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,023 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:39:06,023 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:39:06,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:39:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-07-09 17:39:06,027 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) [2021-07-09 17:39:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1049 transitions. [2021-07-09 17:39:06,028 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1049 transitions. Word has length 20 [2021-07-09 17:39:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,028 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1049 transitions. [2021-07-09 17:39:06,028 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) [2021-07-09 17:39:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1049 transitions. [2021-07-09 17:39:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:06,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,028 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:06,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-07-09 17:39:06,251 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:06,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:06,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 248 times [2021-07-09 17:39:06,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:06,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547866134] [2021-07-09 17:39:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547866134] [2021-07-09 17:39:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547866134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032477112] [2021-07-09 17:39:06,311 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 [2021-07-09 17:39:06,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:06,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:06,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:06,458 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 12 treesize of output 8 [2021-07-09 17:39:06,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:39:06,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,502 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-07-09 17:39:06,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:06,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,508 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 13 treesize of output 9 [2021-07-09 17:39:06,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,532 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:06,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:06,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-07-09 17:39:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032477112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:06,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:06,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861191153] [2021-07-09 17:39:06,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:06,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:06,625 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) [2021-07-09 17:39:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,860 INFO L93 Difference]: Finished difference Result 570 states and 1656 transitions. [2021-07-09 17:39:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:06,860 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 [2021-07-09 17:39:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,861 INFO L225 Difference]: With dead ends: 570 [2021-07-09 17:39:06,861 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 17:39:06,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 17:39:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 335. [2021-07-09 17:39:06,865 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) [2021-07-09 17:39:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-07-09 17:39:06,866 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-07-09 17:39:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,866 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-07-09 17:39:06,866 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) [2021-07-09 17:39:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-07-09 17:39:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:06,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,867 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:07,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,067 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:07,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 249 times [2021-07-09 17:39:07,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:07,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666560370] [2021-07-09 17:39:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:07,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666560370] [2021-07-09 17:39:07,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666560370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947801238] [2021-07-09 17:39:07,128 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 [2021-07-09 17:39:07,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:07,264 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 5 treesize of output 3 [2021-07-09 17:39:07,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:07,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:07,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:07,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:07,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,313 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:07,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:07,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947801238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:07,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:07,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876665356] [2021-07-09 17:39:07,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:07,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:07,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:07,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:07,392 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) [2021-07-09 17:39:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:07,617 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-07-09 17:39:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:07,618 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 [2021-07-09 17:39:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:07,619 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:39:07,619 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:39:07,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:39:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-07-09 17:39:07,622 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) [2021-07-09 17:39:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1016 transitions. [2021-07-09 17:39:07,623 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1016 transitions. Word has length 20 [2021-07-09 17:39:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:07,623 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1016 transitions. [2021-07-09 17:39:07,623 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) [2021-07-09 17:39:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1016 transitions. [2021-07-09 17:39:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:07,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:07,624 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:07,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,824 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 250 times [2021-07-09 17:39:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:07,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262032266] [2021-07-09 17:39:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262032266] [2021-07-09 17:39:07,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262032266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049960563] [2021-07-09 17:39:07,881 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 [2021-07-09 17:39:07,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:07,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:08,008 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 [2021-07-09 17:39:08,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:08,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:08,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:08,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,063 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:08,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:08,064 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049960563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:08,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997267443] [2021-07-09 17:39:08,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:08,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:08,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:08,150 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) [2021-07-09 17:39:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:08,332 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-07-09 17:39:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:08,332 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 [2021-07-09 17:39:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:08,333 INFO L225 Difference]: With dead ends: 505 [2021-07-09 17:39:08,333 INFO L226 Difference]: Without dead ends: 499 [2021-07-09 17:39:08,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-07-09 17:39:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 342. [2021-07-09 17:39:08,336 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) [2021-07-09 17:39:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1043 transitions. [2021-07-09 17:39:08,337 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1043 transitions. Word has length 20 [2021-07-09 17:39:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:08,337 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1043 transitions. [2021-07-09 17:39:08,337 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) [2021-07-09 17:39:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1043 transitions. [2021-07-09 17:39:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:08,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:08,338 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:08,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-07-09 17:39:08,553 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 251 times [2021-07-09 17:39:08,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:08,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942947028] [2021-07-09 17:39:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942947028] [2021-07-09 17:39:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942947028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153161617] [2021-07-09 17:39:08,610 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 [2021-07-09 17:39:08,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:08,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:08,742 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 12 treesize of output 8 [2021-07-09 17:39:08,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,744 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 5 treesize of output 3 [2021-07-09 17:39:08,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:08,766 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 [2021-07-09 17:39:08,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,768 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 [2021-07-09 17:39:08,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,790 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:08,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:08,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153161617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:08,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864668199] [2021-07-09 17:39:08,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:08,866 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) [2021-07-09 17:39:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:09,052 INFO L93 Difference]: Finished difference Result 482 states and 1437 transitions. [2021-07-09 17:39:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:09,052 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 [2021-07-09 17:39:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:09,053 INFO L225 Difference]: With dead ends: 482 [2021-07-09 17:39:09,053 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:39:09,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:39:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 329. [2021-07-09 17:39:09,056 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) [2021-07-09 17:39:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1003 transitions. [2021-07-09 17:39:09,057 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1003 transitions. Word has length 20 [2021-07-09 17:39:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1003 transitions. [2021-07-09 17:39:09,057 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) [2021-07-09 17:39:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1003 transitions. [2021-07-09 17:39:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:09,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:09,057 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:09,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:09,258 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 252 times [2021-07-09 17:39:09,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:09,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938811087] [2021-07-09 17:39:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938811087] [2021-07-09 17:39:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938811087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570293396] [2021-07-09 17:39:09,327 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 [2021-07-09 17:39:09,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:09,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:09,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570293396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:09,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:09,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920293490] [2021-07-09 17:39:09,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:09,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:09,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:09,550 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) [2021-07-09 17:39:09,821 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 17:39:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:09,868 INFO L93 Difference]: Finished difference Result 403 states and 1191 transitions. [2021-07-09 17:39:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:09,868 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 [2021-07-09 17:39:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:09,869 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:39:09,869 INFO L226 Difference]: Without dead ends: 403 [2021-07-09 17:39:09,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-09 17:39:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 336. [2021-07-09 17:39:09,873 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) [2021-07-09 17:39:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1030 transitions. [2021-07-09 17:39:09,873 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1030 transitions. Word has length 20 [2021-07-09 17:39:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:09,873 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1030 transitions. [2021-07-09 17:39:09,873 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) [2021-07-09 17:39:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1030 transitions. [2021-07-09 17:39:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:09,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:09,874 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:10,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-07-09 17:39:10,078 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 253 times [2021-07-09 17:39:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:10,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471925411] [2021-07-09 17:39:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471925411] [2021-07-09 17:39:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471925411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552557524] [2021-07-09 17:39:10,144 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 [2021-07-09 17:39:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552557524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:10,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:10,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822800770] [2021-07-09 17:39:10,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:10,373 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) [2021-07-09 17:39:10,642 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 17:39:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:10,691 INFO L93 Difference]: Finished difference Result 409 states and 1198 transitions. [2021-07-09 17:39:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:10,692 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 [2021-07-09 17:39:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:10,693 INFO L225 Difference]: With dead ends: 409 [2021-07-09 17:39:10,693 INFO L226 Difference]: Without dead ends: 403 [2021-07-09 17:39:10,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-09 17:39:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-07-09 17:39:10,698 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) [2021-07-09 17:39:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1019 transitions. [2021-07-09 17:39:10,699 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1019 transitions. Word has length 20 [2021-07-09 17:39:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:10,699 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1019 transitions. [2021-07-09 17:39:10,699 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) [2021-07-09 17:39:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1019 transitions. [2021-07-09 17:39:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:10,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:10,700 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:10,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,905 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 254 times [2021-07-09 17:39:10,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:10,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627073361] [2021-07-09 17:39:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627073361] [2021-07-09 17:39:10,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627073361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533525567] [2021-07-09 17:39:10,960 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 [2021-07-09 17:39:11,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:11,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533525567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:11,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:11,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187021834] [2021-07-09 17:39:11,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:11,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:11,172 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) [2021-07-09 17:39:11,452 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-09 17:39:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:11,527 INFO L93 Difference]: Finished difference Result 373 states and 1116 transitions. [2021-07-09 17:39:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:11,527 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 [2021-07-09 17:39:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:11,528 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:39:11,528 INFO L226 Difference]: Without dead ends: 361 [2021-07-09 17:39:11,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-09 17:39:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 330. [2021-07-09 17:39:11,531 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) [2021-07-09 17:39:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-07-09 17:39:11,531 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-07-09 17:39:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:11,532 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-07-09 17:39:11,532 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) [2021-07-09 17:39:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-07-09 17:39:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:11,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:11,532 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,735 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 255 times [2021-07-09 17:39:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12827821] [2021-07-09 17:39:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12827821] [2021-07-09 17:39:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12827821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652310009] [2021-07-09 17:39:11,799 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 [2021-07-09 17:39:11,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:11,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652310009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:12,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747857335] [2021-07-09 17:39:12,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:12,004 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) [2021-07-09 17:39:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:12,223 INFO L93 Difference]: Finished difference Result 487 states and 1401 transitions. [2021-07-09 17:39:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:12,223 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 [2021-07-09 17:39:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:12,224 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:39:12,224 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:39:12,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:39:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 338. [2021-07-09 17:39:12,227 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) [2021-07-09 17:39:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-07-09 17:39:12,228 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-07-09 17:39:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:12,228 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-07-09 17:39:12,228 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) [2021-07-09 17:39:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-07-09 17:39:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:12,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:12,229 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:12,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:12,445 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 256 times [2021-07-09 17:39:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60046645] [2021-07-09 17:39:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60046645] [2021-07-09 17:39:12,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60046645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597972854] [2021-07-09 17:39:12,506 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 [2021-07-09 17:39:12,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597972854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010605657] [2021-07-09 17:39:12,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:12,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:12,710 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) [2021-07-09 17:39:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:12,950 INFO L93 Difference]: Finished difference Result 493 states and 1402 transitions. [2021-07-09 17:39:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:12,951 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 [2021-07-09 17:39:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:12,951 INFO L225 Difference]: With dead ends: 493 [2021-07-09 17:39:12,951 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:39:12,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:39:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 341. [2021-07-09 17:39:12,955 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) [2021-07-09 17:39:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-07-09 17:39:12,956 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-07-09 17:39:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:12,956 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-07-09 17:39:12,956 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) [2021-07-09 17:39:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-07-09 17:39:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:12,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:12,956 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,157 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 257 times [2021-07-09 17:39:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172545348] [2021-07-09 17:39:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172545348] [2021-07-09 17:39:13,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172545348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022726376] [2021-07-09 17:39:13,222 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 [2021-07-09 17:39:13,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022726376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:13,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:13,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75279766] [2021-07-09 17:39:13,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:13,427 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) [2021-07-09 17:39:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:13,653 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2021-07-09 17:39:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:13,654 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 [2021-07-09 17:39:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:13,654 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:39:13,654 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:39:13,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:39:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 334. [2021-07-09 17:39:13,658 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) [2021-07-09 17:39:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1028 transitions. [2021-07-09 17:39:13,659 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1028 transitions. Word has length 20 [2021-07-09 17:39:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:13,659 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1028 transitions. [2021-07-09 17:39:13,659 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) [2021-07-09 17:39:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1028 transitions. [2021-07-09 17:39:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:13,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:13,659 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,860 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 258 times [2021-07-09 17:39:13,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338178717] [2021-07-09 17:39:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338178717] [2021-07-09 17:39:13,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338178717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656741757] [2021-07-09 17:39:13,931 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 [2021-07-09 17:39:14,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656741757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:14,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:14,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969900843] [2021-07-09 17:39:14,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:14,132 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) [2021-07-09 17:39:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:14,358 INFO L93 Difference]: Finished difference Result 418 states and 1240 transitions. [2021-07-09 17:39:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:14,359 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 [2021-07-09 17:39:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:14,359 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:39:14,359 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:39:14,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:39:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 331. [2021-07-09 17:39:14,363 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) [2021-07-09 17:39:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1013 transitions. [2021-07-09 17:39:14,363 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1013 transitions. Word has length 20 [2021-07-09 17:39:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:14,363 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1013 transitions. [2021-07-09 17:39:14,363 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) [2021-07-09 17:39:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1013 transitions. [2021-07-09 17:39:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:14,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:14,364 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:14,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-07-09 17:39:14,564 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 259 times [2021-07-09 17:39:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:14,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553924327] [2021-07-09 17:39:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553924327] [2021-07-09 17:39:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553924327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998687560] [2021-07-09 17:39:14,627 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 [2021-07-09 17:39:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998687560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:14,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:14,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692886635] [2021-07-09 17:39:14,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:14,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:14,823 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) [2021-07-09 17:39:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,063 INFO L93 Difference]: Finished difference Result 455 states and 1314 transitions. [2021-07-09 17:39:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:15,064 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 [2021-07-09 17:39:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,064 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:39:15,064 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:39:15,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:39:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 341. [2021-07-09 17:39:15,068 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) [2021-07-09 17:39:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1040 transitions. [2021-07-09 17:39:15,069 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1040 transitions. Word has length 20 [2021-07-09 17:39:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,069 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1040 transitions. [2021-07-09 17:39:15,069 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) [2021-07-09 17:39:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1040 transitions. [2021-07-09 17:39:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:15,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,069 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:15,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,270 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 260 times [2021-07-09 17:39:15,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:15,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796819915] [2021-07-09 17:39:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:15,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796819915] [2021-07-09 17:39:15,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796819915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101286] [2021-07-09 17:39:15,344 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 [2021-07-09 17:39:15,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:15,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:15,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980505760] [2021-07-09 17:39:15,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:15,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:15,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:15,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:15,555 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) [2021-07-09 17:39:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,759 INFO L93 Difference]: Finished difference Result 432 states and 1275 transitions. [2021-07-09 17:39:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:15,759 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 [2021-07-09 17:39:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,760 INFO L225 Difference]: With dead ends: 432 [2021-07-09 17:39:15,760 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 17:39:15,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 17:39:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2021-07-09 17:39:15,763 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) [2021-07-09 17:39:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-07-09 17:39:15,764 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-07-09 17:39:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,764 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-07-09 17:39:15,764 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) [2021-07-09 17:39:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-07-09 17:39:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:15,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:15,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,965 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 261 times [2021-07-09 17:39:15,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:15,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695553680] [2021-07-09 17:39:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:16,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695553680] [2021-07-09 17:39:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695553680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427224956] [2021-07-09 17:39:16,018 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 [2021-07-09 17:39:16,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:16,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:16,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427224956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:16,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860491868] [2021-07-09 17:39:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:16,230 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) [2021-07-09 17:39:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:16,550 INFO L93 Difference]: Finished difference Result 364 states and 1092 transitions. [2021-07-09 17:39:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:16,551 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 [2021-07-09 17:39:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:16,551 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:39:16,551 INFO L226 Difference]: Without dead ends: 352 [2021-07-09 17:39:16,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-09 17:39:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2021-07-09 17:39:16,554 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) [2021-07-09 17:39:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1013 transitions. [2021-07-09 17:39:16,555 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1013 transitions. Word has length 20 [2021-07-09 17:39:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:16,555 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1013 transitions. [2021-07-09 17:39:16,555 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) [2021-07-09 17:39:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1013 transitions. [2021-07-09 17:39:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:16,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:16,556 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:16,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-07-09 17:39:16,756 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 262 times [2021-07-09 17:39:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:16,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125363115] [2021-07-09 17:39:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:16,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125363115] [2021-07-09 17:39:16,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125363115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612299699] [2021-07-09 17:39:16,810 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 [2021-07-09 17:39:16,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:16,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612299699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:17,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:17,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358068951] [2021-07-09 17:39:17,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:17,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:17,019 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) [2021-07-09 17:39:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:17,326 INFO L93 Difference]: Finished difference Result 389 states and 1144 transitions. [2021-07-09 17:39:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:17,326 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 [2021-07-09 17:39:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:17,327 INFO L225 Difference]: With dead ends: 389 [2021-07-09 17:39:17,327 INFO L226 Difference]: Without dead ends: 383 [2021-07-09 17:39:17,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-09 17:39:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2021-07-09 17:39:17,330 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) [2021-07-09 17:39:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1040 transitions. [2021-07-09 17:39:17,331 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1040 transitions. Word has length 20 [2021-07-09 17:39:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:17,331 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1040 transitions. [2021-07-09 17:39:17,331 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) [2021-07-09 17:39:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1040 transitions. [2021-07-09 17:39:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:17,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:17,332 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:17,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,532 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 263 times [2021-07-09 17:39:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:17,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997957706] [2021-07-09 17:39:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:17,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997957706] [2021-07-09 17:39:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997957706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033100286] [2021-07-09 17:39:17,589 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 [2021-07-09 17:39:17,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033100286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:17,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:17,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61712236] [2021-07-09 17:39:17,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:17,793 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) [2021-07-09 17:39:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:18,054 INFO L93 Difference]: Finished difference Result 360 states and 1090 transitions. [2021-07-09 17:39:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:18,054 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 [2021-07-09 17:39:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:18,055 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:39:18,055 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:39:18,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:39:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2021-07-09 17:39:18,058 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) [2021-07-09 17:39:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 995 transitions. [2021-07-09 17:39:18,058 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 995 transitions. Word has length 20 [2021-07-09 17:39:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:18,058 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 995 transitions. [2021-07-09 17:39:18,059 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) [2021-07-09 17:39:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 995 transitions. [2021-07-09 17:39:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:18,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:18,059 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:18,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-07-09 17:39:18,281 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 264 times [2021-07-09 17:39:18,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:18,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936869216] [2021-07-09 17:39:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:18,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936869216] [2021-07-09 17:39:18,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936869216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926903227] [2021-07-09 17:39:18,338 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 [2021-07-09 17:39:18,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:18,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,540 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 13 treesize of output 9 [2021-07-09 17:39:18,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:39:18,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,585 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-07-09 17:39:18,585 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-07-09 17:39:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:18,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,610 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-09 17:39:18,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:18,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-07-09 17:39:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926903227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:18,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:39:18,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173973359] [2021-07-09 17:39:18,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:18,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:18,674 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) [2021-07-09 17:39:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:18,970 INFO L93 Difference]: Finished difference Result 462 states and 1326 transitions. [2021-07-09 17:39:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:18,970 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 [2021-07-09 17:39:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:18,971 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:39:18,971 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 17:39:18,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 17:39:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 322. [2021-07-09 17:39:18,974 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) [2021-07-09 17:39:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 970 transitions. [2021-07-09 17:39:18,975 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 970 transitions. Word has length 20 [2021-07-09 17:39:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:18,975 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 970 transitions. [2021-07-09 17:39:18,975 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) [2021-07-09 17:39:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 970 transitions. [2021-07-09 17:39:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:18,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:18,975 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,176 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 265 times [2021-07-09 17:39:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994516520] [2021-07-09 17:39:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994516520] [2021-07-09 17:39:19,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994516520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618570187] [2021-07-09 17:39:19,230 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 [2021-07-09 17:39:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:19,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:19,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,398 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:39:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:19,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:19,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:19,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618570187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:19,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885103365] [2021-07-09 17:39:19,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:19,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:19,460 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) [2021-07-09 17:39:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:19,639 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-07-09 17:39:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:19,639 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 [2021-07-09 17:39:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:19,640 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:39:19,640 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:39:19,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:39:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 336. [2021-07-09 17:39:19,648 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) [2021-07-09 17:39:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1019 transitions. [2021-07-09 17:39:19,649 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1019 transitions. Word has length 20 [2021-07-09 17:39:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:19,649 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1019 transitions. [2021-07-09 17:39:19,649 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) [2021-07-09 17:39:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1019 transitions. [2021-07-09 17:39:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:19,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:19,649 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2555 [2021-07-09 17:39:19,850 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 266 times [2021-07-09 17:39:19,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881580775] [2021-07-09 17:39:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881580775] [2021-07-09 17:39:19,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881580775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128110047] [2021-07-09 17:39:19,901 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 [2021-07-09 17:39:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:20,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:20,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:20,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,063 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-07-09 17:39:20,065 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 6 treesize of output 4 [2021-07-09 17:39:20,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,087 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-07-09 17:39:20,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-07-09 17:39:20,087 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:20,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:20,087 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:39:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128110047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:20,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:20,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503259605] [2021-07-09 17:39:20,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:20,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:20,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:20,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:20,133 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) [2021-07-09 17:39:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:20,382 INFO L93 Difference]: Finished difference Result 536 states and 1528 transitions. [2021-07-09 17:39:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:20,382 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 [2021-07-09 17:39:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:20,383 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:39:20,383 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:39:20,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:39:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 342. [2021-07-09 17:39:20,387 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) [2021-07-09 17:39:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1044 transitions. [2021-07-09 17:39:20,388 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1044 transitions. Word has length 20 [2021-07-09 17:39:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:20,388 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1044 transitions. [2021-07-09 17:39:20,388 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) [2021-07-09 17:39:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1044 transitions. [2021-07-09 17:39:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:20,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:20,388 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:20,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2564 [2021-07-09 17:39:20,589 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 267 times [2021-07-09 17:39:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:20,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794828965] [2021-07-09 17:39:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794828965] [2021-07-09 17:39:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794828965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624200445] [2021-07-09 17:39:20,639 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 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 [2021-07-09 17:39:20,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:20,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:20,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,793 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:39:20,793 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-07-09 17:39:20,793 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-07-09 17:39:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:20,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:20,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,818 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:20,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:20,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:39:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624200445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:20,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951791325] [2021-07-09 17:39:20,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:20,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:20,872 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) [2021-07-09 17:39:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:21,038 INFO L93 Difference]: Finished difference Result 493 states and 1419 transitions. [2021-07-09 17:39:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:21,038 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 [2021-07-09 17:39:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:21,039 INFO L225 Difference]: With dead ends: 493 [2021-07-09 17:39:21,039 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:39:21,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:39:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 340. [2021-07-09 17:39:21,043 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) [2021-07-09 17:39:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1033 transitions. [2021-07-09 17:39:21,043 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1033 transitions. Word has length 20 [2021-07-09 17:39:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:21,043 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1033 transitions. [2021-07-09 17:39:21,043 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) [2021-07-09 17:39:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1033 transitions. [2021-07-09 17:39:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:21,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:21,044 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:21,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:21,244 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 268 times [2021-07-09 17:39:21,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:21,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110165920] [2021-07-09 17:39:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:21,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110165920] [2021-07-09 17:39:21,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110165920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241528746] [2021-07-09 17:39:21,289 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 [2021-07-09 17:39:21,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:21,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:21,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,423 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 13 treesize of output 9 [2021-07-09 17:39:21,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:39:21,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,460 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.3 percent of original size [2021-07-09 17:39:21,462 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 6 treesize of output 4 [2021-07-09 17:39:21,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,485 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-07-09 17:39:21,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:21,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-07-09 17:39:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241528746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:39:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276318381] [2021-07-09 17:39:21,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:21,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:21,544 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) [2021-07-09 17:39:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:21,895 INFO L93 Difference]: Finished difference Result 438 states and 1286 transitions. [2021-07-09 17:39:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:21,895 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 [2021-07-09 17:39:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:21,896 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:39:21,896 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:39:21,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:39:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:39:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 331. [2021-07-09 17:39:21,899 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) [2021-07-09 17:39:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-07-09 17:39:21,899 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-07-09 17:39:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:21,899 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-07-09 17:39:21,899 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) [2021-07-09 17:39:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-07-09 17:39:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:21,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:21,900 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-07-09 17:39:22,101 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 269 times [2021-07-09 17:39:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382567530] [2021-07-09 17:39:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382567530] [2021-07-09 17:39:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382567530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798416421] [2021-07-09 17:39:22,170 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 [2021-07-09 17:39:22,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:22,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:22,294 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 [2021-07-09 17:39:22,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,326 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-09 17:39:22,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-07-09 17:39:22,329 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 12 treesize of output 8 [2021-07-09 17:39:22,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,331 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 13 treesize of output 9 [2021-07-09 17:39:22,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,351 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:22,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:22,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798416421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:22,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:39:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140580641] [2021-07-09 17:39:22,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:39:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:39:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:22,407 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) [2021-07-09 17:39:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:22,616 INFO L93 Difference]: Finished difference Result 586 states and 1687 transitions. [2021-07-09 17:39:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:22,616 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 [2021-07-09 17:39:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:22,617 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:39:22,617 INFO L226 Difference]: Without dead ends: 586 [2021-07-09 17:39:22,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-09 17:39:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 337. [2021-07-09 17:39:22,621 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) [2021-07-09 17:39:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1022 transitions. [2021-07-09 17:39:22,621 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1022 transitions. Word has length 20 [2021-07-09 17:39:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:22,622 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1022 transitions. [2021-07-09 17:39:22,622 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) [2021-07-09 17:39:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1022 transitions. [2021-07-09 17:39:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:22,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:22,622 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2599,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,823 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 270 times [2021-07-09 17:39:22,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495933172] [2021-07-09 17:39:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495933172] [2021-07-09 17:39:22,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495933172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626231418] [2021-07-09 17:39:22,879 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 [2021-07-09 17:39:22,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:22,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:23,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:23,025 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 6 treesize of output 4 [2021-07-09 17:39:23,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,058 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:39:23,060 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 12 treesize of output 8 [2021-07-09 17:39:23,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,062 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 13 treesize of output 9 [2021-07-09 17:39:23,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,082 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:23,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:23,083 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626231418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787183600] [2021-07-09 17:39:23,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:23,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:23,132 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) [2021-07-09 17:39:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:23,294 INFO L93 Difference]: Finished difference Result 553 states and 1605 transitions. [2021-07-09 17:39:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:23,295 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 [2021-07-09 17:39:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:23,296 INFO L225 Difference]: With dead ends: 553 [2021-07-09 17:39:23,296 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:39:23,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:39:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 340. [2021-07-09 17:39:23,300 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) [2021-07-09 17:39:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1037 transitions. [2021-07-09 17:39:23,300 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1037 transitions. Word has length 20 [2021-07-09 17:39:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:23,300 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1037 transitions. [2021-07-09 17:39:23,300 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) [2021-07-09 17:39:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1037 transitions. [2021-07-09 17:39:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:23,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:23,301 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:23,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:23,501 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 271 times [2021-07-09 17:39:23,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:23,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390535766] [2021-07-09 17:39:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390535766] [2021-07-09 17:39:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390535766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198336290] [2021-07-09 17:39:23,564 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 [2021-07-09 17:39:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:23,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,681 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 13 treesize of output 9 [2021-07-09 17:39:23,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,706 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:39:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:23,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:23,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:23,718 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198336290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:23,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267705488] [2021-07-09 17:39:23,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:23,765 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) [2021-07-09 17:39:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:23,917 INFO L93 Difference]: Finished difference Result 520 states and 1528 transitions. [2021-07-09 17:39:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:23,918 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 [2021-07-09 17:39:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:23,919 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:39:23,919 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:39:23,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:39:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 331. [2021-07-09 17:39:23,922 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) [2021-07-09 17:39:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-07-09 17:39:23,923 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-07-09 17:39:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:23,923 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-07-09 17:39:23,923 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) [2021-07-09 17:39:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-07-09 17:39:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:23,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:23,923 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2620,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,124 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 272 times [2021-07-09 17:39:24,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404958288] [2021-07-09 17:39:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404958288] [2021-07-09 17:39:24,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404958288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566045237] [2021-07-09 17:39:24,182 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 [2021-07-09 17:39:24,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:24,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:24,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:24,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,341 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:39:24,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-07-09 17:39:24,343 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 12 treesize of output 8 [2021-07-09 17:39:24,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:24,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:24,366 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:24,366 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:24,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:24,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:39:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566045237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:24,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:24,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450311458] [2021-07-09 17:39:24,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:24,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:24,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:24,450 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) [2021-07-09 17:39:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:24,758 INFO L93 Difference]: Finished difference Result 651 states and 1812 transitions. [2021-07-09 17:39:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:24,758 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 [2021-07-09 17:39:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:24,759 INFO L225 Difference]: With dead ends: 651 [2021-07-09 17:39:24,759 INFO L226 Difference]: Without dead ends: 651 [2021-07-09 17:39:24,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-07-09 17:39:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 339. [2021-07-09 17:39:24,764 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) [2021-07-09 17:39:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1034 transitions. [2021-07-09 17:39:24,764 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1034 transitions. Word has length 20 [2021-07-09 17:39:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:24,765 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1034 transitions. [2021-07-09 17:39:24,765 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) [2021-07-09 17:39:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1034 transitions. [2021-07-09 17:39:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:24,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:24,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,966 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 273 times [2021-07-09 17:39:24,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78588334] [2021-07-09 17:39:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78588334] [2021-07-09 17:39:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78588334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802988528] [2021-07-09 17:39:25,029 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 [2021-07-09 17:39:25,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:25,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:25,164 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 6 treesize of output 4 [2021-07-09 17:39:25,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,206 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-09 17:39:25,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:25,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:25,230 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 [2021-07-09 17:39:25,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:39:25,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,253 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:39:25,253 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:25,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:25,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-09 17:39:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802988528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:25,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:25,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599990246] [2021-07-09 17:39:25,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:25,331 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) [2021-07-09 17:39:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:25,544 INFO L93 Difference]: Finished difference Result 585 states and 1658 transitions. [2021-07-09 17:39:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:25,545 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 [2021-07-09 17:39:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:25,546 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:39:25,546 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 17:39:25,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 17:39:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-07-09 17:39:25,550 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) [2021-07-09 17:39:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-07-09 17:39:25,551 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-07-09 17:39:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:25,551 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-07-09 17:39:25,551 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) [2021-07-09 17:39:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-07-09 17:39:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:25,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:25,551 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:25,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-07-09 17:39:25,752 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 274 times [2021-07-09 17:39:25,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:25,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55636483] [2021-07-09 17:39:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55636483] [2021-07-09 17:39:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55636483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178743401] [2021-07-09 17:39:25,813 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 [2021-07-09 17:39:25,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:25,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:25,934 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 [2021-07-09 17:39:25,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,978 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-09 17:39:25,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:25,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,983 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 [2021-07-09 17:39:25,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,007 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-07-09 17:39:26,009 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 12 treesize of output 8 [2021-07-09 17:39:26,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:26,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:26,020 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-07-09 17:39:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178743401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:26,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:26,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489876518] [2021-07-09 17:39:26,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:26,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:26,105 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) [2021-07-09 17:39:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:26,344 INFO L93 Difference]: Finished difference Result 610 states and 1747 transitions. [2021-07-09 17:39:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:26,345 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 [2021-07-09 17:39:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:26,346 INFO L225 Difference]: With dead ends: 610 [2021-07-09 17:39:26,346 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 17:39:26,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 17:39:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 336. [2021-07-09 17:39:26,350 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) [2021-07-09 17:39:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-07-09 17:39:26,350 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-07-09 17:39:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:26,351 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-07-09 17:39:26,351 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) [2021-07-09 17:39:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-07-09 17:39:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:26,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:26,351 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:26,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-07-09 17:39:26,552 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 275 times [2021-07-09 17:39:26,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:26,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251592507] [2021-07-09 17:39:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251592507] [2021-07-09 17:39:26,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251592507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067062561] [2021-07-09 17:39:26,612 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 [2021-07-09 17:39:26,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:26,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:26,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:26,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,774 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-07-09 17:39:26,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:26,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,798 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-07-09 17:39:26,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-07-09 17:39:26,800 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 [2021-07-09 17:39:26,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:26,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:26,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-09 17:39:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067062561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:26,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909903653] [2021-07-09 17:39:26,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:26,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:26,889 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) [2021-07-09 17:39:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,123 INFO L93 Difference]: Finished difference Result 579 states and 1680 transitions. [2021-07-09 17:39:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:27,123 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 [2021-07-09 17:39:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,124 INFO L225 Difference]: With dead ends: 579 [2021-07-09 17:39:27,124 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 17:39:27,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 17:39:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-07-09 17:39:27,128 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) [2021-07-09 17:39:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-07-09 17:39:27,128 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-07-09 17:39:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,128 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-07-09 17:39:27,128 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) [2021-07-09 17:39:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-07-09 17:39:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:27,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,129 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:27,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2663 [2021-07-09 17:39:27,329 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 276 times [2021-07-09 17:39:27,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:27,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429891680] [2021-07-09 17:39:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429891680] [2021-07-09 17:39:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429891680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309955629] [2021-07-09 17:39:27,385 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 [2021-07-09 17:39:27,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:27,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:27,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:27,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,562 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:39:27,564 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 [2021-07-09 17:39:27,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,567 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 [2021-07-09 17:39:27,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,586 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:39:27,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:27,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:39:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309955629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:27,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:27,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308768600] [2021-07-09 17:39:27,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:27,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:27,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:27,667 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) [2021-07-09 17:39:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,874 INFO L93 Difference]: Finished difference Result 533 states and 1527 transitions. [2021-07-09 17:39:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:27,874 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 [2021-07-09 17:39:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,875 INFO L225 Difference]: With dead ends: 533 [2021-07-09 17:39:27,875 INFO L226 Difference]: Without dead ends: 527 [2021-07-09 17:39:27,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-09 17:39:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 337. [2021-07-09 17:39:27,879 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) [2021-07-09 17:39:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1023 transitions. [2021-07-09 17:39:27,879 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1023 transitions. Word has length 20 [2021-07-09 17:39:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,879 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1023 transitions. [2021-07-09 17:39:27,879 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) [2021-07-09 17:39:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1023 transitions. [2021-07-09 17:39:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:27,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,880 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:28,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-07-09 17:39:28,080 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:28,081 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 277 times [2021-07-09 17:39:28,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:28,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558141988] [2021-07-09 17:39:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558141988] [2021-07-09 17:39:28,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558141988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146968030] [2021-07-09 17:39:28,139 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 [2021-07-09 17:39:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:28,256 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 6 treesize of output 4 [2021-07-09 17:39:28,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,298 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-09 17:39:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:28,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:28,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:28,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:28,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,346 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-07-09 17:39:28,347 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:39:28,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:39:28,347 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-09 17:39:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146968030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883268972] [2021-07-09 17:39:28,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:28,424 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) [2021-07-09 17:39:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:28,661 INFO L93 Difference]: Finished difference Result 539 states and 1548 transitions. [2021-07-09 17:39:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:28,661 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 [2021-07-09 17:39:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:28,662 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:39:28,662 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:39:28,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:39:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-07-09 17:39:28,666 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) [2021-07-09 17:39:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-07-09 17:39:28,666 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-07-09 17:39:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:28,666 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-07-09 17:39:28,666 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) [2021-07-09 17:39:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-07-09 17:39:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:28,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:28,667 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:28,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-07-09 17:39:28,867 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:28,867 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 278 times [2021-07-09 17:39:28,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:28,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049937617] [2021-07-09 17:39:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049937617] [2021-07-09 17:39:28,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049937617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164919469] [2021-07-09 17:39:28,924 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 [2021-07-09 17:39:28,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:28,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:29,066 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 12 treesize of output 8 [2021-07-09 17:39:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:29,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,083 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:39:29,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:29,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:39:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164919469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:29,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:39:29,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869140956] [2021-07-09 17:39:29,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:39:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:39:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:29,120 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) [2021-07-09 17:39:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:29,273 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-07-09 17:39:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:29,274 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 [2021-07-09 17:39:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:29,274 INFO L225 Difference]: With dead ends: 469 [2021-07-09 17:39:29,274 INFO L226 Difference]: Without dead ends: 469 [2021-07-09 17:39:29,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-09 17:39:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-07-09 17:39:29,278 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) [2021-07-09 17:39:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-07-09 17:39:29,279 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-07-09 17:39:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:29,279 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-07-09 17:39:29,279 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) [2021-07-09 17:39:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-07-09 17:39:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:29,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:29,279 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:29,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:29,480 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 279 times [2021-07-09 17:39:29,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:29,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368871038] [2021-07-09 17:39:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:29,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368871038] [2021-07-09 17:39:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368871038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799921903] [2021-07-09 17:39:29,535 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 [2021-07-09 17:39:29,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:29,659 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 12 treesize of output 8 [2021-07-09 17:39:29,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:29,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,676 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:39:29,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:29,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:39:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799921903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:29,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:29,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129323586] [2021-07-09 17:39:29,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:29,732 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) [2021-07-09 17:39:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:29,899 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-07-09 17:39:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:29,899 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 [2021-07-09 17:39:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:29,900 INFO L225 Difference]: With dead ends: 473 [2021-07-09 17:39:29,900 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 17:39:29,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 17:39:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-07-09 17:39:29,903 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) [2021-07-09 17:39:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-07-09 17:39:29,904 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-07-09 17:39:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:29,904 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-07-09 17:39:29,904 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) [2021-07-09 17:39:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-07-09 17:39:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:29,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:29,904 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:30,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-07-09 17:39:30,105 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 280 times [2021-07-09 17:39:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:30,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046325185] [2021-07-09 17:39:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046325185] [2021-07-09 17:39:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046325185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025726532] [2021-07-09 17:39:30,158 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 [2021-07-09 17:39:30,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:30,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:30,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:39:30,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,301 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 13 treesize of output 9 [2021-07-09 17:39:30,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,318 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:39:30,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:30,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:39:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025726532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:30,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:30,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144978529] [2021-07-09 17:39:30,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:30,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:30,373 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) [2021-07-09 17:39:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:30,535 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-07-09 17:39:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:30,535 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 [2021-07-09 17:39:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:30,536 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:39:30,536 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:39:30,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:39:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-07-09 17:39:30,539 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) [2021-07-09 17:39:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-07-09 17:39:30,540 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-07-09 17:39:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:30,540 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-07-09 17:39:30,540 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) [2021-07-09 17:39:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-07-09 17:39:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:30,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:30,540 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:30,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-07-09 17:39:30,741 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 281 times [2021-07-09 17:39:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113619595] [2021-07-09 17:39:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:30,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113619595] [2021-07-09 17:39:30,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113619595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289885982] [2021-07-09 17:39:30,797 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 [2021-07-09 17:39:30,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289885982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:30,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001885994] [2021-07-09 17:39:30,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:30,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:30,964 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) [2021-07-09 17:39:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:31,103 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-07-09 17:39:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:31,104 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 [2021-07-09 17:39:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:31,104 INFO L225 Difference]: With dead ends: 383 [2021-07-09 17:39:31,104 INFO L226 Difference]: Without dead ends: 383 [2021-07-09 17:39:31,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-09 17:39:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-07-09 17:39:31,108 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) [2021-07-09 17:39:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-09 17:39:31,108 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-09 17:39:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:31,108 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-09 17:39:31,108 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) [2021-07-09 17:39:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-09 17:39:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:31,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:31,109 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,309 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 282 times [2021-07-09 17:39:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681208060] [2021-07-09 17:39:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681208060] [2021-07-09 17:39:31,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681208060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547418126] [2021-07-09 17:39:31,366 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 [2021-07-09 17:39:31,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547418126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:31,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233730303] [2021-07-09 17:39:31,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:31,540 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) [2021-07-09 17:39:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:31,740 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-07-09 17:39:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:31,740 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 [2021-07-09 17:39:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:31,741 INFO L225 Difference]: With dead ends: 389 [2021-07-09 17:39:31,741 INFO L226 Difference]: Without dead ends: 389 [2021-07-09 17:39:31,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-09 17:39:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-07-09 17:39:31,744 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) [2021-07-09 17:39:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-07-09 17:39:31,745 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-07-09 17:39:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:31,745 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-07-09 17:39:31,745 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) [2021-07-09 17:39:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-07-09 17:39:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:31,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:31,745 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,946 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 283 times [2021-07-09 17:39:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294410038] [2021-07-09 17:39:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294410038] [2021-07-09 17:39:32,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294410038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562312262] [2021-07-09 17:39:32,004 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 [2021-07-09 17:39:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562312262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:32,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:32,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474698682] [2021-07-09 17:39:32,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:32,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:32,184 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) [2021-07-09 17:39:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:32,319 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-07-09 17:39:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:32,320 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 [2021-07-09 17:39:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:32,320 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:39:32,320 INFO L226 Difference]: Without dead ends: 347 [2021-07-09 17:39:32,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-09 17:39:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-07-09 17:39:32,323 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) [2021-07-09 17:39:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-07-09 17:39:32,324 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-07-09 17:39:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:32,324 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-07-09 17:39:32,324 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) [2021-07-09 17:39:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-07-09 17:39:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:32,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:32,324 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:32,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-07-09 17:39:32,525 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 284 times [2021-07-09 17:39:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:32,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024326082] [2021-07-09 17:39:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024326082] [2021-07-09 17:39:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024326082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729647536] [2021-07-09 17:39:32,586 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 [2021-07-09 17:39:32,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729647536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:32,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:32,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997561262] [2021-07-09 17:39:32,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:32,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:32,797 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) [2021-07-09 17:39:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:33,040 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-07-09 17:39:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:33,040 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 [2021-07-09 17:39:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:33,041 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:39:33,041 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:39:33,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:39:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-07-09 17:39:33,045 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) [2021-07-09 17:39:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-07-09 17:39:33,045 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-07-09 17:39:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:33,045 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-07-09 17:39:33,045 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) [2021-07-09 17:39:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-07-09 17:39:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:33,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:33,046 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:33,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,246 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 285 times [2021-07-09 17:39:33,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:33,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860567435] [2021-07-09 17:39:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:33,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:33,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860567435] [2021-07-09 17:39:33,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860567435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731433467] [2021-07-09 17:39:33,306 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 [2021-07-09 17:39:33,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:33,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731433467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:33,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:33,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615129552] [2021-07-09 17:39:33,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:33,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:33,503 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) [2021-07-09 17:39:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:33,691 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-07-09 17:39:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:33,691 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 [2021-07-09 17:39:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:33,692 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:39:33,692 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:39:33,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:39:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-07-09 17:39:33,695 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) [2021-07-09 17:39:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-07-09 17:39:33,696 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-07-09 17:39:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:33,696 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-07-09 17:39:33,696 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) [2021-07-09 17:39:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-07-09 17:39:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:33,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:33,697 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:33,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,897 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 286 times [2021-07-09 17:39:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:33,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767116649] [2021-07-09 17:39:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767116649] [2021-07-09 17:39:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767116649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867510118] [2021-07-09 17:39:33,971 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 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 [2021-07-09 17:39:34,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867510118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:34,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135946564] [2021-07-09 17:39:34,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:34,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:34,183 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) [2021-07-09 17:39:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:34,369 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-07-09 17:39:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:34,370 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 [2021-07-09 17:39:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:34,371 INFO L225 Difference]: With dead ends: 526 [2021-07-09 17:39:34,371 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 17:39:34,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 17:39:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-07-09 17:39:34,376 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) [2021-07-09 17:39:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-07-09 17:39:34,377 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-07-09 17:39:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:34,377 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-07-09 17:39:34,377 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) [2021-07-09 17:39:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-07-09 17:39:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:34,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:34,378 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:34,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2742,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,593 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 287 times [2021-07-09 17:39:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:34,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897126403] [2021-07-09 17:39:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:34,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897126403] [2021-07-09 17:39:34,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897126403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093623998] [2021-07-09 17:39:34,657 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 [2021-07-09 17:39:34,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093623998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:34,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765296256] [2021-07-09 17:39:34,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:34,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:34,858 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) [2021-07-09 17:39:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,031 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-07-09 17:39:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:35,032 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 [2021-07-09 17:39:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,032 INFO L225 Difference]: With dead ends: 495 [2021-07-09 17:39:35,033 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:39:35,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:39:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-07-09 17:39:35,036 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) [2021-07-09 17:39:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-07-09 17:39:35,037 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-07-09 17:39:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,037 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-07-09 17:39:35,037 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) [2021-07-09 17:39:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-07-09 17:39:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:35,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,037 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:35,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-07-09 17:39:35,238 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 288 times [2021-07-09 17:39:35,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:35,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936782081] [2021-07-09 17:39:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936782081] [2021-07-09 17:39:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936782081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365679086] [2021-07-09 17:39:35,296 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 [2021-07-09 17:39:35,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:35,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365679086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:35,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241497567] [2021-07-09 17:39:35,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:35,499 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) [2021-07-09 17:39:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,669 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-07-09 17:39:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:35,669 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 [2021-07-09 17:39:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,670 INFO L225 Difference]: With dead ends: 492 [2021-07-09 17:39:35,670 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 17:39:35,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 17:39:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-07-09 17:39:35,673 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) [2021-07-09 17:39:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-07-09 17:39:35,674 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-07-09 17:39:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,674 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-07-09 17:39:35,674 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) [2021-07-09 17:39:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-07-09 17:39:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:35,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,675 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:35,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:35,875 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 289 times [2021-07-09 17:39:35,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:35,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210593304] [2021-07-09 17:39:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210593304] [2021-07-09 17:39:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210593304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312547642] [2021-07-09 17:39:35,947 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 [2021-07-09 17:39:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312547642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:36,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990052926] [2021-07-09 17:39:36,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:36,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:36,143 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) [2021-07-09 17:39:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:36,400 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-07-09 17:39:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:36,401 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 [2021-07-09 17:39:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:36,402 INFO L225 Difference]: With dead ends: 498 [2021-07-09 17:39:36,402 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:39:36,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:39:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-07-09 17:39:36,411 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) [2021-07-09 17:39:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-07-09 17:39:36,411 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-07-09 17:39:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:36,411 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-07-09 17:39:36,411 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) [2021-07-09 17:39:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-07-09 17:39:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:36,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:36,412 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:36,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-07-09 17:39:36,612 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:36,613 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 290 times [2021-07-09 17:39:36,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:36,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686835049] [2021-07-09 17:39:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:36,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686835049] [2021-07-09 17:39:36,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686835049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10235004] [2021-07-09 17:39:36,679 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 [2021-07-09 17:39:36,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:36,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:36,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10235004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:36,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200888617] [2021-07-09 17:39:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:36,849 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) [2021-07-09 17:39:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:37,045 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-07-09 17:39:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:37,045 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 [2021-07-09 17:39:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:37,046 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:39:37,046 INFO L226 Difference]: Without dead ends: 431 [2021-07-09 17:39:37,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-09 17:39:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-07-09 17:39:37,050 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) [2021-07-09 17:39:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-07-09 17:39:37,050 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-07-09 17:39:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:37,050 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-07-09 17:39:37,050 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) [2021-07-09 17:39:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-07-09 17:39:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:37,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:37,051 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:37,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2774,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,251 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 291 times [2021-07-09 17:39:37,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:37,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817766069] [2021-07-09 17:39:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817766069] [2021-07-09 17:39:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817766069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945364316] [2021-07-09 17:39:37,323 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 [2021-07-09 17:39:37,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945364316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:37,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:37,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501001913] [2021-07-09 17:39:37,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:37,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:37,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:37,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:37,495 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) [2021-07-09 17:39:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:37,696 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-07-09 17:39:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:37,697 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 [2021-07-09 17:39:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:37,697 INFO L225 Difference]: With dead ends: 425 [2021-07-09 17:39:37,697 INFO L226 Difference]: Without dead ends: 425 [2021-07-09 17:39:37,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-09 17:39:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-07-09 17:39:37,701 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) [2021-07-09 17:39:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-07-09 17:39:37,701 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-07-09 17:39:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:37,701 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-07-09 17:39:37,701 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) [2021-07-09 17:39:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-07-09 17:39:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:37,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:37,702 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:37,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,902 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 292 times [2021-07-09 17:39:37,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:37,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754791646] [2021-07-09 17:39:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754791646] [2021-07-09 17:39:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754791646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628440049] [2021-07-09 17:39:37,963 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 [2021-07-09 17:39:38,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628440049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:38,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757339991] [2021-07-09 17:39:38,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:38,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:38,164 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) [2021-07-09 17:39:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,353 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-07-09 17:39:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:38,353 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 [2021-07-09 17:39:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,354 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:39:38,354 INFO L226 Difference]: Without dead ends: 386 [2021-07-09 17:39:38,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-09 17:39:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-07-09 17:39:38,357 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) [2021-07-09 17:39:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-07-09 17:39:38,358 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-07-09 17:39:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,358 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-07-09 17:39:38,358 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) [2021-07-09 17:39:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-07-09 17:39:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:38,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,358 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:38,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,559 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 293 times [2021-07-09 17:39:38,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:38,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336452668] [2021-07-09 17:39:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336452668] [2021-07-09 17:39:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336452668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149760720] [2021-07-09 17:39:38,615 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 [2021-07-09 17:39:38,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149760720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:38,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650227941] [2021-07-09 17:39:38,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:38,782 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) [2021-07-09 17:39:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,978 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-07-09 17:39:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:38,978 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 [2021-07-09 17:39:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,978 INFO L225 Difference]: With dead ends: 393 [2021-07-09 17:39:38,978 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:39:38,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:39:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-07-09 17:39:38,982 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) [2021-07-09 17:39:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-07-09 17:39:38,983 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-07-09 17:39:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,983 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-07-09 17:39:38,983 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) [2021-07-09 17:39:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-07-09 17:39:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:38,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,983 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:39,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:39,184 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:39,184 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 294 times [2021-07-09 17:39:39,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:39,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342933443] [2021-07-09 17:39:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:39,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342933443] [2021-07-09 17:39:39,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342933443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668146004] [2021-07-09 17:39:39,242 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 [2021-07-09 17:39:39,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:39,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:39,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668146004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:39,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:39,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431692755] [2021-07-09 17:39:39,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:39,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:39,409 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) [2021-07-09 17:39:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:39,612 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-07-09 17:39:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:39,612 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 [2021-07-09 17:39:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:39,613 INFO L225 Difference]: With dead ends: 399 [2021-07-09 17:39:39,613 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 17:39:39,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 17:39:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-07-09 17:39:39,616 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) [2021-07-09 17:39:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-07-09 17:39:39,617 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-07-09 17:39:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:39,617 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-07-09 17:39:39,617 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) [2021-07-09 17:39:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-07-09 17:39:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:39,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:39,617 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:39,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-07-09 17:39:39,818 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:39,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:39,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 295 times [2021-07-09 17:39:39,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:39,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321565793] [2021-07-09 17:39:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:39,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321565793] [2021-07-09 17:39:39,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321565793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779904673] [2021-07-09 17:39:39,879 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 [2021-07-09 17:39:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:39,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779904673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:40,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:40,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825166575] [2021-07-09 17:39:40,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:40,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:40,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:40,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:40,042 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) [2021-07-09 17:39:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,245 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-07-09 17:39:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:40,245 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 [2021-07-09 17:39:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,246 INFO L225 Difference]: With dead ends: 368 [2021-07-09 17:39:40,246 INFO L226 Difference]: Without dead ends: 368 [2021-07-09 17:39:40,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-09 17:39:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-07-09 17:39:40,249 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) [2021-07-09 17:39:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-07-09 17:39:40,249 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-07-09 17:39:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,249 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-07-09 17:39:40,249 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) [2021-07-09 17:39:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-07-09 17:39:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:40,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,250 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:40,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,450 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 296 times [2021-07-09 17:39:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:40,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700265570] [2021-07-09 17:39:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700265570] [2021-07-09 17:39:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700265570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908165445] [2021-07-09 17:39:40,532 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 [2021-07-09 17:39:40,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908165445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:40,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37165429] [2021-07-09 17:39:40,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:40,735 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) [2021-07-09 17:39:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,975 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-07-09 17:39:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:40,976 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 [2021-07-09 17:39:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,976 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:39:40,976 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:39:40,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:39:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-07-09 17:39:40,979 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) [2021-07-09 17:39:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-07-09 17:39:40,980 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-07-09 17:39:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,980 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-07-09 17:39:40,980 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) [2021-07-09 17:39:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-07-09 17:39:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:40,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,981 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:41,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,181 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 297 times [2021-07-09 17:39:41,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:41,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807388679] [2021-07-09 17:39:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807388679] [2021-07-09 17:39:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807388679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268278965] [2021-07-09 17:39:41,249 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 [2021-07-09 17:39:41,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:41,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:41,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268278965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:41,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470089622] [2021-07-09 17:39:41,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:41,471 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) [2021-07-09 17:39:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:41,731 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-07-09 17:39:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:41,732 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 [2021-07-09 17:39:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:41,732 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:39:41,732 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:39:41,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:39:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-07-09 17:39:41,737 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) [2021-07-09 17:39:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-07-09 17:39:41,737 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-07-09 17:39:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:41,738 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-07-09 17:39:41,738 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) [2021-07-09 17:39:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-07-09 17:39:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:41,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:41,738 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:41,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2821 [2021-07-09 17:39:41,953 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 298 times [2021-07-09 17:39:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872566432] [2021-07-09 17:39:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872566432] [2021-07-09 17:39:42,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872566432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055872940] [2021-07-09 17:39:42,006 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 [2021-07-09 17:39:42,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055872940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:42,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97017674] [2021-07-09 17:39:42,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:42,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:42,254 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) [2021-07-09 17:39:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:42,590 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-07-09 17:39:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:42,591 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 [2021-07-09 17:39:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:42,591 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:39:42,591 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:39:42,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:39:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-07-09 17:39:42,594 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) [2021-07-09 17:39:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-09 17:39:42,595 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-09 17:39:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:42,595 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-09 17:39:42,595 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) [2021-07-09 17:39:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-09 17:39:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:42,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:42,595 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2833,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,796 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 299 times [2021-07-09 17:39:42,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648650605] [2021-07-09 17:39:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648650605] [2021-07-09 17:39:42,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648650605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420600657] [2021-07-09 17:39:42,890 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 [2021-07-09 17:39:42,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:42,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420600657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320032844] [2021-07-09 17:39:43,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:43,153 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) [2021-07-09 17:39:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:43,379 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-07-09 17:39:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:43,379 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 [2021-07-09 17:39:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:43,380 INFO L225 Difference]: With dead ends: 456 [2021-07-09 17:39:43,380 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:39:43,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:39:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-07-09 17:39:43,383 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) [2021-07-09 17:39:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-07-09 17:39:43,384 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-07-09 17:39:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:43,384 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-07-09 17:39:43,384 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) [2021-07-09 17:39:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-07-09 17:39:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:43,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:43,385 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:43,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-07-09 17:39:43,585 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 300 times [2021-07-09 17:39:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:43,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463841580] [2021-07-09 17:39:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:43,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463841580] [2021-07-09 17:39:43,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463841580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703621707] [2021-07-09 17:39:43,665 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 [2021-07-09 17:39:43,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703621707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:43,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:43,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758751788] [2021-07-09 17:39:43,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:43,908 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) [2021-07-09 17:39:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:44,123 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-07-09 17:39:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:44,123 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 [2021-07-09 17:39:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:44,124 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:39:44,124 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:39:44,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:39:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-07-09 17:39:44,128 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) [2021-07-09 17:39:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-07-09 17:39:44,128 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-07-09 17:39:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:44,128 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-07-09 17:39:44,128 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) [2021-07-09 17:39:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-07-09 17:39:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:44,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:44,129 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:44,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,329 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 301 times [2021-07-09 17:39:44,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:44,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375706866] [2021-07-09 17:39:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375706866] [2021-07-09 17:39:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375706866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556515190] [2021-07-09 17:39:44,404 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 [2021-07-09 17:39:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556515190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773059524] [2021-07-09 17:39:44,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:44,633 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) [2021-07-09 17:39:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:44,852 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-07-09 17:39:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:44,852 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 [2021-07-09 17:39:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:44,853 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:39:44,853 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:39:44,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:39:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-07-09 17:39:44,856 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) [2021-07-09 17:39:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-07-09 17:39:44,857 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-07-09 17:39:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:44,857 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-07-09 17:39:44,857 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) [2021-07-09 17:39:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-07-09 17:39:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:44,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:44,858 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:45,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-07-09 17:39:45,058 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 302 times [2021-07-09 17:39:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:45,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898416167] [2021-07-09 17:39:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898416167] [2021-07-09 17:39:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898416167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810189923] [2021-07-09 17:39:45,131 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 [2021-07-09 17:39:45,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:45,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810189923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:45,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:45,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982207424] [2021-07-09 17:39:45,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:45,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:45,336 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) [2021-07-09 17:39:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:45,584 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-07-09 17:39:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:45,584 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 [2021-07-09 17:39:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:45,585 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:39:45,585 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:39:45,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:39:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-07-09 17:39:45,588 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) [2021-07-09 17:39:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-07-09 17:39:45,588 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-07-09 17:39:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:45,588 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-07-09 17:39:45,588 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) [2021-07-09 17:39:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-07-09 17:39:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:45,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:45,589 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:45,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2885 [2021-07-09 17:39:45,795 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 303 times [2021-07-09 17:39:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:45,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356557140] [2021-07-09 17:39:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356557140] [2021-07-09 17:39:45,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356557140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182328774] [2021-07-09 17:39:45,891 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 [2021-07-09 17:39:45,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:45,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182328774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:46,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376976323] [2021-07-09 17:39:46,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:46,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:46,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:46,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:46,125 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) [2021-07-09 17:39:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:46,339 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-07-09 17:39:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:46,339 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 [2021-07-09 17:39:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:46,340 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:39:46,340 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:39:46,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:39:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-07-09 17:39:46,343 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) [2021-07-09 17:39:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-07-09 17:39:46,344 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-07-09 17:39:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:46,344 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-07-09 17:39:46,344 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) [2021-07-09 17:39:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-07-09 17:39:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:46,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:46,344 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:46,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-07-09 17:39:46,545 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 304 times [2021-07-09 17:39:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:46,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871464781] [2021-07-09 17:39:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871464781] [2021-07-09 17:39:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871464781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548528642] [2021-07-09 17:39:46,616 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 [2021-07-09 17:39:46,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548528642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:46,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096203230] [2021-07-09 17:39:46,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:46,809 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) [2021-07-09 17:39:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:47,042 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-07-09 17:39:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:47,042 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 [2021-07-09 17:39:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:47,043 INFO L225 Difference]: With dead ends: 401 [2021-07-09 17:39:47,043 INFO L226 Difference]: Without dead ends: 401 [2021-07-09 17:39:47,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-09 17:39:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-07-09 17:39:47,046 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) [2021-07-09 17:39:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-09 17:39:47,046 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-09 17:39:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:47,047 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-09 17:39:47,047 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) [2021-07-09 17:39:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-09 17:39:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:47,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:47,047 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:47,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2904,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,248 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 305 times [2021-07-09 17:39:47,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:47,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980690138] [2021-07-09 17:39:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980690138] [2021-07-09 17:39:47,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980690138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521471479] [2021-07-09 17:39:47,302 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 [2021-07-09 17:39:47,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521471479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134449409] [2021-07-09 17:39:47,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:47,506 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) [2021-07-09 17:39:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:47,794 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-07-09 17:39:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:47,794 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 [2021-07-09 17:39:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:47,794 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:39:47,794 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:39:47,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:39:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-07-09 17:39:47,798 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) [2021-07-09 17:39:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-07-09 17:39:47,798 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-07-09 17:39:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:47,798 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-07-09 17:39:47,798 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) [2021-07-09 17:39:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-07-09 17:39:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:47,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:47,799 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:47,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,999 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 306 times [2021-07-09 17:39:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374345087] [2021-07-09 17:39:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374345087] [2021-07-09 17:39:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374345087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129989610] [2021-07-09 17:39:48,054 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 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 [2021-07-09 17:39:48,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129989610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:48,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:48,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950825385] [2021-07-09 17:39:48,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:48,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:48,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:48,275 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) [2021-07-09 17:39:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,583 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-07-09 17:39:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:48,584 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 [2021-07-09 17:39:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,584 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:39:48,584 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:39:48,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:39:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:39:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-07-09 17:39:48,588 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) [2021-07-09 17:39:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-07-09 17:39:48,588 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-07-09 17:39:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,589 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-07-09 17:39:48,589 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) [2021-07-09 17:39:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-07-09 17:39:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:48,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,589 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2922 [2021-07-09 17:39:48,790 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 307 times [2021-07-09 17:39:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338646127] [2021-07-09 17:39:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338646127] [2021-07-09 17:39:48,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338646127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951432409] [2021-07-09 17:39:48,854 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 [2021-07-09 17:39:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951432409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267702911] [2021-07-09 17:39:49,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:49,095 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) [2021-07-09 17:39:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:49,339 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-07-09 17:39:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:49,344 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 [2021-07-09 17:39:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:49,345 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:39:49,345 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:39:49,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:39:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-07-09 17:39:49,348 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) [2021-07-09 17:39:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-07-09 17:39:49,348 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-07-09 17:39:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:49,348 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-07-09 17:39:49,348 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) [2021-07-09 17:39:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-07-09 17:39:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:49,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:49,349 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:49,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:49,549 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 308 times [2021-07-09 17:39:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:49,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360754415] [2021-07-09 17:39:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360754415] [2021-07-09 17:39:49,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360754415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837794818] [2021-07-09 17:39:49,620 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 [2021-07-09 17:39:49,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:49,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:49,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837794818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664095237] [2021-07-09 17:39:49,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:49,799 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) [2021-07-09 17:39:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:49,974 INFO L93 Difference]: Finished difference Result 414 states and 1199 transitions. [2021-07-09 17:39:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:49,974 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 [2021-07-09 17:39:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:49,975 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:39:49,975 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:39:49,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:39:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 320. [2021-07-09 17:39:49,978 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) [2021-07-09 17:39:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-07-09 17:39:49,979 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-07-09 17:39:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:49,979 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-07-09 17:39:49,979 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) [2021-07-09 17:39:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-07-09 17:39:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:49,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:49,980 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,180 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 309 times [2021-07-09 17:39:50,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083378820] [2021-07-09 17:39:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083378820] [2021-07-09 17:39:50,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083378820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571422436] [2021-07-09 17:39:50,244 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 [2021-07-09 17:39:50,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:50,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571422436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:50,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:50,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291676013] [2021-07-09 17:39:50,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:50,454 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) [2021-07-09 17:39:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:50,631 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-07-09 17:39:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:50,632 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 [2021-07-09 17:39:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:50,632 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:39:50,632 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:39:50,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:39:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-07-09 17:39:50,636 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) [2021-07-09 17:39:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-09 17:39:50,636 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-09 17:39:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:50,637 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-09 17:39:50,637 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) [2021-07-09 17:39:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-09 17:39:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:50,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:50,637 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:50,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-07-09 17:39:50,838 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 310 times [2021-07-09 17:39:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435752736] [2021-07-09 17:39:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435752736] [2021-07-09 17:39:50,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435752736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281165658] [2021-07-09 17:39:50,901 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 [2021-07-09 17:39:50,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:50,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281165658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:51,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:51,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326982214] [2021-07-09 17:39:51,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:51,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:51,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:51,099 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) [2021-07-09 17:39:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:51,344 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-07-09 17:39:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:51,344 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 [2021-07-09 17:39:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:51,345 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:39:51,345 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:39:51,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:39:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-07-09 17:39:51,349 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) [2021-07-09 17:39:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-07-09 17:39:51,349 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-07-09 17:39:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:51,349 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-07-09 17:39:51,349 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) [2021-07-09 17:39:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-07-09 17:39:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:51,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:51,350 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:51,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-07-09 17:39:51,550 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 311 times [2021-07-09 17:39:51,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:51,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327723176] [2021-07-09 17:39:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:51,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327723176] [2021-07-09 17:39:51,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327723176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251668683] [2021-07-09 17:39:51,613 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 [2021-07-09 17:39:51,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:51,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:51,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251668683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:51,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:51,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862248061] [2021-07-09 17:39:51,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:51,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:51,833 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) [2021-07-09 17:39:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:52,064 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-07-09 17:39:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:52,065 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 [2021-07-09 17:39:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:52,065 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:39:52,065 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:39:52,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:39:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-07-09 17:39:52,069 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) [2021-07-09 17:39:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-07-09 17:39:52,070 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-07-09 17:39:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:52,070 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-07-09 17:39:52,070 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) [2021-07-09 17:39:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-07-09 17:39:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:52,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:52,070 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:52,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-07-09 17:39:52,271 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 312 times [2021-07-09 17:39:52,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:52,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710741042] [2021-07-09 17:39:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710741042] [2021-07-09 17:39:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710741042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425941617] [2021-07-09 17:39:52,335 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 [2021-07-09 17:39:52,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:52,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425941617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:52,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:52,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166348626] [2021-07-09 17:39:52,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:52,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:52,538 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) [2021-07-09 17:39:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:52,760 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-07-09 17:39:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:52,760 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 [2021-07-09 17:39:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:52,761 INFO L225 Difference]: With dead ends: 460 [2021-07-09 17:39:52,761 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:39:52,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:39:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-07-09 17:39:52,765 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) [2021-07-09 17:39:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-07-09 17:39:52,765 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-07-09 17:39:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:52,765 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-07-09 17:39:52,765 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) [2021-07-09 17:39:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-07-09 17:39:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:52,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:52,766 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:52,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-07-09 17:39:52,966 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 313 times [2021-07-09 17:39:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:52,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840893993] [2021-07-09 17:39:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840893993] [2021-07-09 17:39:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840893993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204343957] [2021-07-09 17:39:53,027 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 [2021-07-09 17:39:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204343957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:53,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827541059] [2021-07-09 17:39:53,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:53,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:53,242 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) [2021-07-09 17:39:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:53,480 INFO L93 Difference]: Finished difference Result 443 states and 1276 transitions. [2021-07-09 17:39:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:53,481 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 [2021-07-09 17:39:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:53,481 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:39:53,481 INFO L226 Difference]: Without dead ends: 443 [2021-07-09 17:39:53,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-09 17:39:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 324. [2021-07-09 17:39:53,485 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) [2021-07-09 17:39:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-07-09 17:39:53,485 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-07-09 17:39:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:53,485 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-07-09 17:39:53,485 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) [2021-07-09 17:39:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-07-09 17:39:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:53,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:53,486 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:53,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-07-09 17:39:53,686 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 314 times [2021-07-09 17:39:53,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:53,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572420931] [2021-07-09 17:39:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:53,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572420931] [2021-07-09 17:39:53,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572420931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765646363] [2021-07-09 17:39:53,750 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 [2021-07-09 17:39:53,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765646363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:53,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:53,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130480708] [2021-07-09 17:39:53,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:53,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:53,947 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) [2021-07-09 17:39:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:54,122 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-07-09 17:39:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:54,122 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 [2021-07-09 17:39:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:54,123 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:39:54,123 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:39:54,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:39:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-07-09 17:39:54,126 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) [2021-07-09 17:39:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-07-09 17:39:54,127 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-07-09 17:39:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:54,127 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-07-09 17:39:54,127 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) [2021-07-09 17:39:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-07-09 17:39:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:54,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:54,127 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:54,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,328 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 315 times [2021-07-09 17:39:54,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:54,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276519737] [2021-07-09 17:39:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276519737] [2021-07-09 17:39:54,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276519737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812377815] [2021-07-09 17:39:54,390 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 [2021-07-09 17:39:54,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812377815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:54,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:54,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866377872] [2021-07-09 17:39:54,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:54,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:54,594 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) [2021-07-09 17:39:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:54,791 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-07-09 17:39:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:54,791 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 [2021-07-09 17:39:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:54,792 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:39:54,792 INFO L226 Difference]: Without dead ends: 384 [2021-07-09 17:39:54,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-09 17:39:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-07-09 17:39:54,795 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) [2021-07-09 17:39:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-07-09 17:39:54,795 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-07-09 17:39:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:54,796 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-07-09 17:39:54,796 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) [2021-07-09 17:39:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-07-09 17:39:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:54,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:54,796 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3009,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,997 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 316 times [2021-07-09 17:39:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44991256] [2021-07-09 17:39:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44991256] [2021-07-09 17:39:55,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44991256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205900705] [2021-07-09 17:39:55,058 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 [2021-07-09 17:39:55,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:55,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205900705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:55,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:55,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061312881] [2021-07-09 17:39:55,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:55,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:55,236 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) [2021-07-09 17:39:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:55,418 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-07-09 17:39:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:55,418 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 [2021-07-09 17:39:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:55,419 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:39:55,419 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:39:55,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:39:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-07-09 17:39:55,422 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) [2021-07-09 17:39:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-07-09 17:39:55,422 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-07-09 17:39:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:55,422 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-07-09 17:39:55,422 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) [2021-07-09 17:39:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-07-09 17:39:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:55,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:55,423 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:55,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-07-09 17:39:55,623 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 317 times [2021-07-09 17:39:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:55,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542331453] [2021-07-09 17:39:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542331453] [2021-07-09 17:39:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542331453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439766878] [2021-07-09 17:39:55,681 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 [2021-07-09 17:39:55,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439766878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:55,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:55,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129614174] [2021-07-09 17:39:55,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:55,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:55,880 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) [2021-07-09 17:39:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,042 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-07-09 17:39:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:56,042 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 [2021-07-09 17:39:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,043 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:39:56,043 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:39:56,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:39:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-07-09 17:39:56,047 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) [2021-07-09 17:39:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-07-09 17:39:56,047 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-07-09 17:39:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-07-09 17:39:56,047 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) [2021-07-09 17:39:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-07-09 17:39:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:56,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,048 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:56,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:56,248 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 318 times [2021-07-09 17:39:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:56,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362409037] [2021-07-09 17:39:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:56,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362409037] [2021-07-09 17:39:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362409037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845483224] [2021-07-09 17:39:56,308 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 [2021-07-09 17:39:56,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:56,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845483224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:56,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654224907] [2021-07-09 17:39:56,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:56,488 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) [2021-07-09 17:39:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,697 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-07-09 17:39:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:39:56,698 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 [2021-07-09 17:39:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,698 INFO L225 Difference]: With dead ends: 390 [2021-07-09 17:39:56,698 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:39:56,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:39:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-07-09 17:39:56,702 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) [2021-07-09 17:39:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-07-09 17:39:56,702 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-07-09 17:39:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,702 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-07-09 17:39:56,702 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) [2021-07-09 17:39:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-07-09 17:39:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:56,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,703 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:56,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:56,903 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 319 times [2021-07-09 17:39:56,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:56,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245416327] [2021-07-09 17:39:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:56,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245416327] [2021-07-09 17:39:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245416327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480611637] [2021-07-09 17:39:56,961 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 [2021-07-09 17:39:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480611637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:57,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:39:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050143519] [2021-07-09 17:39:57,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:39:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:57,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:39:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:39:57,165 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) [2021-07-09 17:39:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:57,327 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-07-09 17:39:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:57,327 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 [2021-07-09 17:39:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:57,328 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:39:57,328 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:39:57,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:39:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-07-09 17:39:57,331 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) [2021-07-09 17:39:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-07-09 17:39:57,331 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-07-09 17:39:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:57,332 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-07-09 17:39:57,332 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) [2021-07-09 17:39:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-07-09 17:39:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:57,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:57,332 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:57,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:57,533 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 320 times [2021-07-09 17:39:57,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:57,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48462621] [2021-07-09 17:39:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48462621] [2021-07-09 17:39:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48462621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244504361] [2021-07-09 17:39:57,582 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 [2021-07-09 17:39:57,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:57,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244504361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454820313] [2021-07-09 17:39:57,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:57,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:57,764 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) [2021-07-09 17:39:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:57,899 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-07-09 17:39:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:57,899 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 [2021-07-09 17:39:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:57,900 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:39:57,900 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:39:57,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:39:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-07-09 17:39:57,903 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) [2021-07-09 17:39:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-07-09 17:39:57,903 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-07-09 17:39:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:57,903 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-07-09 17:39:57,903 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) [2021-07-09 17:39:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-07-09 17:39:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:57,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:57,904 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-07-09 17:39:58,104 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 321 times [2021-07-09 17:39:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618878755] [2021-07-09 17:39:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618878755] [2021-07-09 17:39:58,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618878755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372143212] [2021-07-09 17:39:58,156 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 [2021-07-09 17:39:58,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372143212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:58,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612262071] [2021-07-09 17:39:58,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:58,322 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) [2021-07-09 17:39:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:58,474 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-07-09 17:39:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:39:58,475 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 [2021-07-09 17:39:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:58,475 INFO L225 Difference]: With dead ends: 354 [2021-07-09 17:39:58,475 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:39:58,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:39:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:39:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-07-09 17:39:58,478 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) [2021-07-09 17:39:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-07-09 17:39:58,479 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-07-09 17:39:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:58,479 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-07-09 17:39:58,479 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) [2021-07-09 17:39:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-07-09 17:39:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:58,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:58,480 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:58,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-09 17:39:58,680 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 322 times [2021-07-09 17:39:58,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:58,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288744067] [2021-07-09 17:39:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288744067] [2021-07-09 17:39:58,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288744067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338729214] [2021-07-09 17:39:58,733 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 [2021-07-09 17:39:58,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338729214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:58,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746325177] [2021-07-09 17:39:58,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:58,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:58,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:58,903 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) [2021-07-09 17:39:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:59,029 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-07-09 17:39:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:59,029 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 [2021-07-09 17:39:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:59,030 INFO L225 Difference]: With dead ends: 325 [2021-07-09 17:39:59,030 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:39:59,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:39:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:39:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-07-09 17:39:59,033 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) [2021-07-09 17:39:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-07-09 17:39:59,033 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-07-09 17:39:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:59,033 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-07-09 17:39:59,033 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) [2021-07-09 17:39:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-07-09 17:39:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:59,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:59,034 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:59,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,234 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 323 times [2021-07-09 17:39:59,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:59,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907704869] [2021-07-09 17:39:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907704869] [2021-07-09 17:39:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907704869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549125702] [2021-07-09 17:39:59,285 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 [2021-07-09 17:39:59,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549125702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:59,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:39:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044640711] [2021-07-09 17:39:59,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:39:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:59,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:39:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:39:59,444 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) [2021-07-09 17:39:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:59,585 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-07-09 17:39:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:39:59,586 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 [2021-07-09 17:39:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:59,586 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:39:59,586 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 17:39:59,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 17:39:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-07-09 17:39:59,589 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) [2021-07-09 17:39:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-07-09 17:39:59,590 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-07-09 17:39:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:59,590 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-07-09 17:39:59,590 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) [2021-07-09 17:39:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-07-09 17:39:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:59,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:59,590 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:59,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-07-09 17:39:59,791 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 324 times [2021-07-09 17:39:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319673249] [2021-07-09 17:39:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319673249] [2021-07-09 17:39:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319673249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029937183] [2021-07-09 17:39:59,861 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 [2021-07-09 17:39:59,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:59,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:39:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029937183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:00,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110424069] [2021-07-09 17:40:00,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:00,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:00,018 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) [2021-07-09 17:40:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:00,171 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-07-09 17:40:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:00,171 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 [2021-07-09 17:40:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:00,172 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:40:00,172 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:40:00,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:40:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-07-09 17:40:00,175 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) [2021-07-09 17:40:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-07-09 17:40:00,175 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-07-09 17:40:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:00,175 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-07-09 17:40:00,175 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) [2021-07-09 17:40:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-07-09 17:40:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:00,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:00,176 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:00,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-07-09 17:40:00,376 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 325 times [2021-07-09 17:40:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:00,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071451298] [2021-07-09 17:40:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:00,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071451298] [2021-07-09 17:40:00,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071451298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467233146] [2021-07-09 17:40:00,437 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 [2021-07-09 17:40:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467233146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:00,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:00,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053992769] [2021-07-09 17:40:00,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:00,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:00,592 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) [2021-07-09 17:40:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:00,725 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-07-09 17:40:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:00,726 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 [2021-07-09 17:40:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:00,726 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:40:00,726 INFO L226 Difference]: Without dead ends: 335 [2021-07-09 17:40:00,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-09 17:40:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-07-09 17:40:00,729 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) [2021-07-09 17:40:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-07-09 17:40:00,730 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-07-09 17:40:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:00,730 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-07-09 17:40:00,730 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) [2021-07-09 17:40:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-07-09 17:40:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:00,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:00,730 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:00,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,931 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 326 times [2021-07-09 17:40:00,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:00,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974955839] [2021-07-09 17:40:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:00,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974955839] [2021-07-09 17:40:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974955839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651480086] [2021-07-09 17:40:00,988 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 [2021-07-09 17:40:01,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:01,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:01,186 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-07-09 17:40:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:01,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:01,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:01,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:01,211 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:01,211 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:40:01,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:01,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-07-09 17:40:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:01,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651480086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:01,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:40:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842620736] [2021-07-09 17:40:01,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:01,278 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) [2021-07-09 17:40:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:01,736 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-07-09 17:40:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:01,737 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 [2021-07-09 17:40:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:01,737 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:40:01,737 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:40:01,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:40:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-07-09 17:40:01,740 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) [2021-07-09 17:40:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-07-09 17:40:01,740 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-07-09 17:40:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:01,741 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-07-09 17:40:01,741 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) [2021-07-09 17:40:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-07-09 17:40:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:01,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:01,741 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:01,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-09 17:40:01,942 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:01,942 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 327 times [2021-07-09 17:40:01,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:01,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556080907] [2021-07-09 17:40:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:01,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556080907] [2021-07-09 17:40:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556080907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709091596] [2021-07-09 17:40:01,997 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 [2021-07-09 17:40:02,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:02,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:02,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,165 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-07-09 17:40:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:02,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,187 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-07-09 17:40:02,188 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-07-09 17:40:02,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:02,188 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709091596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:02,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352070747] [2021-07-09 17:40:02,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:02,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:02,229 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) [2021-07-09 17:40:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:02,445 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-07-09 17:40:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:02,446 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 [2021-07-09 17:40:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:02,446 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:40:02,446 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:40:02,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:40:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-07-09 17:40:02,449 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) [2021-07-09 17:40:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-09 17:40:02,450 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-09 17:40:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:02,450 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-09 17:40:02,450 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) [2021-07-09 17:40:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-09 17:40:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:02,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:02,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:02,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-07-09 17:40:02,651 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 328 times [2021-07-09 17:40:02,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:02,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375727960] [2021-07-09 17:40:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375727960] [2021-07-09 17:40:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375727960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803896405] [2021-07-09 17:40:02,707 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 [2021-07-09 17:40:02,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:02,845 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 6 treesize of output 4 [2021-07-09 17:40:02,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,879 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:40:02,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:02,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:02,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,903 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:02,904 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:40:02,904 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-07-09 17:40:02,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:02,904 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:40:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803896405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:02,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749036526] [2021-07-09 17:40:02,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:02,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:02,952 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) [2021-07-09 17:40:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:03,271 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-07-09 17:40:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:03,271 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 [2021-07-09 17:40:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:03,272 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:40:03,272 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 17:40:03,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 17:40:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-07-09 17:40:03,276 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) [2021-07-09 17:40:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-09 17:40:03,276 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-09 17:40:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-09 17:40:03,276 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) [2021-07-09 17:40:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-09 17:40:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:03,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:03,277 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:03,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-09 17:40:03,477 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 329 times [2021-07-09 17:40:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:03,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903575021] [2021-07-09 17:40:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903575021] [2021-07-09 17:40:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903575021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290376944] [2021-07-09 17:40:03,547 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 [2021-07-09 17:40:03,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:03,675 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 5 treesize of output 3 [2021-07-09 17:40:03,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:03,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,731 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:40:03,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:03,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,736 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 13 treesize of output 9 [2021-07-09 17:40:03,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,755 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:03,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:03,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290376944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:03,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010712674] [2021-07-09 17:40:03,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:03,807 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) [2021-07-09 17:40:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:04,029 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-07-09 17:40:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:04,029 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 [2021-07-09 17:40:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:04,030 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:40:04,030 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:40:04,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:40:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-07-09 17:40:04,034 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) [2021-07-09 17:40:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-09 17:40:04,034 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-09 17:40:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:04,034 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-09 17:40:04,034 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) [2021-07-09 17:40:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-09 17:40:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:04,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:04,035 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:04,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-07-09 17:40:04,235 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 330 times [2021-07-09 17:40:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:04,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192846457] [2021-07-09 17:40:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:04,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192846457] [2021-07-09 17:40:04,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192846457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027216645] [2021-07-09 17:40:04,292 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 [2021-07-09 17:40:04,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:04,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:04,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:04,418 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 6 treesize of output 4 [2021-07-09 17:40:04,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:04,442 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-07-09 17:40:04,444 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 [2021-07-09 17:40:04,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:04,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:04,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:04,454 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027216645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:04,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:04,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759971714] [2021-07-09 17:40:04,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:04,508 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) [2021-07-09 17:40:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:04,819 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-07-09 17:40:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:04,819 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 [2021-07-09 17:40:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:04,820 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:40:04,820 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:40:04,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:40:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-07-09 17:40:04,823 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) [2021-07-09 17:40:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-07-09 17:40:04,824 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-07-09 17:40:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:04,824 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-07-09 17:40:04,824 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) [2021-07-09 17:40:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-07-09 17:40:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:04,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:04,825 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:05,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-07-09 17:40:05,025 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 331 times [2021-07-09 17:40:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:05,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632223441] [2021-07-09 17:40:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632223441] [2021-07-09 17:40:05,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632223441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837943825] [2021-07-09 17:40:05,093 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 [2021-07-09 17:40:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:05,219 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 [2021-07-09 17:40:05,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:05,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,275 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:40:05,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:05,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,280 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 13 treesize of output 9 [2021-07-09 17:40:05,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,300 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:05,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:05,300 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837943825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:05,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612403316] [2021-07-09 17:40:05,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:05,351 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) [2021-07-09 17:40:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:05,585 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-07-09 17:40:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:05,586 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 [2021-07-09 17:40:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:05,586 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:40:05,586 INFO L226 Difference]: Without dead ends: 517 [2021-07-09 17:40:05,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-09 17:40:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-07-09 17:40:05,590 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) [2021-07-09 17:40:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-07-09 17:40:05,591 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-07-09 17:40:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:05,591 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-07-09 17:40:05,591 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) [2021-07-09 17:40:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-07-09 17:40:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:05,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:05,591 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:05,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:05,792 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 332 times [2021-07-09 17:40:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:05,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570958384] [2021-07-09 17:40:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570958384] [2021-07-09 17:40:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570958384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658395662] [2021-07-09 17:40:05,850 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 [2021-07-09 17:40:05,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:05,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:05,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:05,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,018 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-07-09 17:40:06,019 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:40:06,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:06,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:06,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:06,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:06,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,065 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:40:06,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:06,066 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-07-09 17:40:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658395662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:06,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:06,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20436598] [2021-07-09 17:40:06,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:06,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:06,123 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) [2021-07-09 17:40:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:06,337 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-07-09 17:40:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:06,337 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 [2021-07-09 17:40:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:06,338 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:40:06,338 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:40:06,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:40:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-07-09 17:40:06,342 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) [2021-07-09 17:40:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-09 17:40:06,342 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-09 17:40:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:06,342 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-09 17:40:06,342 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) [2021-07-09 17:40:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-09 17:40:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:06,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:06,343 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:06,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-07-09 17:40:06,543 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 333 times [2021-07-09 17:40:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:06,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463829890] [2021-07-09 17:40:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463829890] [2021-07-09 17:40:06,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463829890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021037404] [2021-07-09 17:40:06,622 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 [2021-07-09 17:40:06,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:06,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:06,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:06,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,805 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-07-09 17:40:06,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:06,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,812 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 13 treesize of output 9 [2021-07-09 17:40:06,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,832 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:06,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-07-09 17:40:06,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:06,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021037404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:06,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:06,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523014401] [2021-07-09 17:40:06,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:06,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:06,911 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) [2021-07-09 17:40:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:07,309 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-07-09 17:40:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:07,309 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 [2021-07-09 17:40:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:07,310 INFO L225 Difference]: With dead ends: 615 [2021-07-09 17:40:07,310 INFO L226 Difference]: Without dead ends: 615 [2021-07-09 17:40:07,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-09 17:40:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-07-09 17:40:07,314 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) [2021-07-09 17:40:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-07-09 17:40:07,315 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-07-09 17:40:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:07,315 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-07-09 17:40:07,315 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) [2021-07-09 17:40:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-07-09 17:40:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:07,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:07,315 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:07,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,516 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 334 times [2021-07-09 17:40:07,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:07,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975547377] [2021-07-09 17:40:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975547377] [2021-07-09 17:40:07,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975547377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289774154] [2021-07-09 17:40:07,577 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 [2021-07-09 17:40:07,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:07,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,749 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-09 17:40:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:07,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,785 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:40:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:07,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:07,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,809 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:07,809 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:40:07,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:07,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:40:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289774154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:07,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129292486] [2021-07-09 17:40:07,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:07,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:07,889 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) [2021-07-09 17:40:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:08,149 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-07-09 17:40:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:08,149 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 [2021-07-09 17:40:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:08,150 INFO L225 Difference]: With dead ends: 549 [2021-07-09 17:40:08,150 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:40:08,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:40:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-07-09 17:40:08,154 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) [2021-07-09 17:40:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-09 17:40:08,154 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-09 17:40:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:08,155 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-09 17:40:08,155 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) [2021-07-09 17:40:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-09 17:40:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:08,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:08,155 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:08,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-07-09 17:40:08,356 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:08,356 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 335 times [2021-07-09 17:40:08,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:08,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172581243] [2021-07-09 17:40:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:08,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172581243] [2021-07-09 17:40:08,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172581243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140985082] [2021-07-09 17:40:08,420 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 [2021-07-09 17:40:08,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:08,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:08,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,597 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-09 17:40:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:08,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,631 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:40:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:08,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:08,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,656 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:08,656 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:40:08,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:08,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:40:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140985082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:08,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:08,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937892236] [2021-07-09 17:40:08,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:08,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:08,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:08,742 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) [2021-07-09 17:40:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,074 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-07-09 17:40:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:09,074 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 [2021-07-09 17:40:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,075 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:40:09,075 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:40:09,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:40:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-07-09 17:40:09,079 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) [2021-07-09 17:40:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-07-09 17:40:09,080 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-07-09 17:40:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,080 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-07-09 17:40:09,080 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) [2021-07-09 17:40:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-07-09 17:40:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:09,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,080 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:09,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-09 17:40:09,281 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 336 times [2021-07-09 17:40:09,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:09,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287176238] [2021-07-09 17:40:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:09,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287176238] [2021-07-09 17:40:09,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287176238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792692641] [2021-07-09 17:40:09,344 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 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 [2021-07-09 17:40:09,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:09,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:09,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:09,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,522 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-09 17:40:09,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:09,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:09,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,549 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 17:40:09,549 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-09 17:40:09,549 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-07-09 17:40:09,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:09,550 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:40:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792692641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:09,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:09,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465630419] [2021-07-09 17:40:09,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:09,641 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) [2021-07-09 17:40:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,893 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-07-09 17:40:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:09,893 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 [2021-07-09 17:40:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,894 INFO L225 Difference]: With dead ends: 543 [2021-07-09 17:40:09,894 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:40:09,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:40:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-07-09 17:40:09,897 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) [2021-07-09 17:40:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-07-09 17:40:09,898 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-07-09 17:40:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,898 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-07-09 17:40:09,898 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) [2021-07-09 17:40:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-07-09 17:40:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:09,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,899 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-07-09 17:40:10,099 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 337 times [2021-07-09 17:40:10,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139571763] [2021-07-09 17:40:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:10,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139571763] [2021-07-09 17:40:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139571763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628304727] [2021-07-09 17:40:10,163 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 [2021-07-09 17:40:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:10,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:10,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,290 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 5 treesize of output 3 [2021-07-09 17:40:10,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:10,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:10,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:10,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:10,334 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:40:10,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:10,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-07-09 17:40:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628304727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:10,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19676136] [2021-07-09 17:40:10,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:10,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:10,417 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) [2021-07-09 17:40:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:10,662 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-07-09 17:40:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:10,663 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 [2021-07-09 17:40:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:10,663 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:40:10,663 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:40:10,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:40:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-07-09 17:40:10,667 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) [2021-07-09 17:40:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-07-09 17:40:10,668 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-07-09 17:40:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:10,668 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-07-09 17:40:10,668 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) [2021-07-09 17:40:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-07-09 17:40:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:10,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:10,668 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-07-09 17:40:10,869 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 338 times [2021-07-09 17:40:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402429560] [2021-07-09 17:40:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:10,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402429560] [2021-07-09 17:40:10,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402429560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403831264] [2021-07-09 17:40:10,930 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 [2021-07-09 17:40:11,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:11,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,066 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 6 treesize of output 4 [2021-07-09 17:40:11,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,109 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-07-09 17:40:11,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:11,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,145 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-09 17:40:11,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-07-09 17:40:11,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:11,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:11,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,170 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-07-09 17:40:11,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:11,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-07-09 17:40:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403831264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:11,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038485387] [2021-07-09 17:40:11,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:11,248 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) [2021-07-09 17:40:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:11,535 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-07-09 17:40:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:11,535 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 [2021-07-09 17:40:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:11,536 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:40:11,536 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:40:11,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:40:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-07-09 17:40:11,540 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) [2021-07-09 17:40:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-07-09 17:40:11,540 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-07-09 17:40:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-07-09 17:40:11,540 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) [2021-07-09 17:40:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-07-09 17:40:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:11,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:11,541 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:11,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,741 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 339 times [2021-07-09 17:40:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081610732] [2021-07-09 17:40:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081610732] [2021-07-09 17:40:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081610732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425999418] [2021-07-09 17:40:11,800 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 [2021-07-09 17:40:11,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:11,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:11,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:11,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:11,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,965 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:11,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:11,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425999418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:12,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523838269] [2021-07-09 17:40:12,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:12,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:12,006 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) [2021-07-09 17:40:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,205 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-07-09 17:40:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:12,207 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 [2021-07-09 17:40:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,208 INFO L225 Difference]: With dead ends: 467 [2021-07-09 17:40:12,208 INFO L226 Difference]: Without dead ends: 467 [2021-07-09 17:40:12,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-07-09 17:40:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-07-09 17:40:12,212 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) [2021-07-09 17:40:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-07-09 17:40:12,213 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-07-09 17:40:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,213 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-07-09 17:40:12,213 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) [2021-07-09 17:40:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-07-09 17:40:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:12,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,213 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:12,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:12,414 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 340 times [2021-07-09 17:40:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:12,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261392160] [2021-07-09 17:40:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:12,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261392160] [2021-07-09 17:40:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261392160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825056181] [2021-07-09 17:40:12,471 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 [2021-07-09 17:40:12,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:12,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:12,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:12,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:12,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:12,619 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:12,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:12,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825056181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:12,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:12,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637623186] [2021-07-09 17:40:12,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:12,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:12,676 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) [2021-07-09 17:40:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,935 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-07-09 17:40:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:12,935 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 [2021-07-09 17:40:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,936 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:40:12,936 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:40:12,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:40:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-07-09 17:40:12,940 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) [2021-07-09 17:40:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-07-09 17:40:12,940 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-07-09 17:40:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,940 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-07-09 17:40:12,940 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) [2021-07-09 17:40:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-07-09 17:40:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:12,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,941 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:13,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:13,141 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 341 times [2021-07-09 17:40:13,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:13,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070961702] [2021-07-09 17:40:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070961702] [2021-07-09 17:40:13,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070961702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197411077] [2021-07-09 17:40:13,199 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 [2021-07-09 17:40:13,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:13,330 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 12 treesize of output 8 [2021-07-09 17:40:13,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,332 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 13 treesize of output 9 [2021-07-09 17:40:13,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,347 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:13,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:13,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197411077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:13,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863182577] [2021-07-09 17:40:13,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:13,401 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) [2021-07-09 17:40:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:13,637 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-07-09 17:40:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:13,637 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 [2021-07-09 17:40:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:13,638 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:40:13,638 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:40:13,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:40:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-07-09 17:40:13,642 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) [2021-07-09 17:40:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-09 17:40:13,642 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-09 17:40:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:13,642 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-09 17:40:13,642 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) [2021-07-09 17:40:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-09 17:40:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:13,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:13,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:13,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3241,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:13,843 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 342 times [2021-07-09 17:40:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:13,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784457647] [2021-07-09 17:40:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784457647] [2021-07-09 17:40:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784457647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691706675] [2021-07-09 17:40:13,904 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 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 [2021-07-09 17:40:13,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:13,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:13,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691706675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:14,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36899452] [2021-07-09 17:40:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:14,073 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) [2021-07-09 17:40:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:14,248 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-07-09 17:40:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:14,249 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 [2021-07-09 17:40:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:14,249 INFO L225 Difference]: With dead ends: 381 [2021-07-09 17:40:14,249 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:40:14,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:40:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-07-09 17:40:14,253 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) [2021-07-09 17:40:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-07-09 17:40:14,253 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-07-09 17:40:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:14,253 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-07-09 17:40:14,253 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) [2021-07-09 17:40:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-07-09 17:40:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:14,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:14,254 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:14,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-07-09 17:40:14,454 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 343 times [2021-07-09 17:40:14,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:14,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661604636] [2021-07-09 17:40:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:14,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:14,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661604636] [2021-07-09 17:40:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661604636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608668206] [2021-07-09 17:40:14,516 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 [2021-07-09 17:40:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:14,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608668206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142210174] [2021-07-09 17:40:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:14,701 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) [2021-07-09 17:40:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:14,914 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-07-09 17:40:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:14,915 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 [2021-07-09 17:40:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:14,915 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:40:14,915 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:40:14,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:40:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-07-09 17:40:14,919 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) [2021-07-09 17:40:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-07-09 17:40:14,919 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-07-09 17:40:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:14,919 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-07-09 17:40:14,919 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) [2021-07-09 17:40:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-07-09 17:40:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:14,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:14,920 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:15,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-07-09 17:40:15,120 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 344 times [2021-07-09 17:40:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:15,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376112198] [2021-07-09 17:40:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376112198] [2021-07-09 17:40:15,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376112198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637781604] [2021-07-09 17:40:15,180 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 [2021-07-09 17:40:15,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:15,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637781604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:15,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440565622] [2021-07-09 17:40:15,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:15,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:15,348 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) [2021-07-09 17:40:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:15,497 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-07-09 17:40:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:15,497 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 [2021-07-09 17:40:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:15,498 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:40:15,498 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:40:15,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:40:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-07-09 17:40:15,501 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) [2021-07-09 17:40:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-07-09 17:40:15,501 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-07-09 17:40:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:15,501 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-07-09 17:40:15,501 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) [2021-07-09 17:40:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-07-09 17:40:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:15,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:15,502 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:15,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:15,702 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 345 times [2021-07-09 17:40:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:15,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386860814] [2021-07-09 17:40:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386860814] [2021-07-09 17:40:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386860814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224788146] [2021-07-09 17:40:15,770 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 [2021-07-09 17:40:15,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:15,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224788146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:15,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858803471] [2021-07-09 17:40:15,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:15,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:15,954 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) [2021-07-09 17:40:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:16,296 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-07-09 17:40:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:16,296 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 [2021-07-09 17:40:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:16,297 INFO L225 Difference]: With dead ends: 510 [2021-07-09 17:40:16,297 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 17:40:16,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 17:40:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-07-09 17:40:16,301 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) [2021-07-09 17:40:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-07-09 17:40:16,301 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-07-09 17:40:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:16,301 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-07-09 17:40:16,301 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) [2021-07-09 17:40:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-07-09 17:40:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:16,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:16,302 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:16,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:16,502 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:16,503 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 346 times [2021-07-09 17:40:16,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:16,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337386747] [2021-07-09 17:40:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:16,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:16,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337386747] [2021-07-09 17:40:16,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337386747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:16,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285485998] [2021-07-09 17:40:16,567 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 [2021-07-09 17:40:16,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:16,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:16,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285485998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:16,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:16,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:16,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015847155] [2021-07-09 17:40:16,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:16,756 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) [2021-07-09 17:40:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:16,960 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-07-09 17:40:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:16,960 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 [2021-07-09 17:40:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:16,961 INFO L225 Difference]: With dead ends: 444 [2021-07-09 17:40:16,961 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:40:16,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:40:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-07-09 17:40:16,965 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) [2021-07-09 17:40:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-09 17:40:16,965 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-09 17:40:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:16,965 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-09 17:40:16,965 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) [2021-07-09 17:40:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-09 17:40:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:16,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:16,966 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:17,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:17,166 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 347 times [2021-07-09 17:40:17,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:17,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850133926] [2021-07-09 17:40:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:17,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850133926] [2021-07-09 17:40:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850133926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653774831] [2021-07-09 17:40:17,237 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 [2021-07-09 17:40:17,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:17,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:17,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653774831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:17,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:17,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849187609] [2021-07-09 17:40:17,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:17,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:17,420 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) [2021-07-09 17:40:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:17,620 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-07-09 17:40:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:17,620 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 [2021-07-09 17:40:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:17,621 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:40:17,621 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 17:40:17,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 17:40:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-07-09 17:40:17,625 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) [2021-07-09 17:40:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-07-09 17:40:17,625 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-07-09 17:40:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:17,625 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-07-09 17:40:17,625 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) [2021-07-09 17:40:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-07-09 17:40:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:17,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:17,626 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:17,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3279 [2021-07-09 17:40:17,827 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 348 times [2021-07-09 17:40:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:17,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633755165] [2021-07-09 17:40:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:17,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633755165] [2021-07-09 17:40:17,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633755165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714805271] [2021-07-09 17:40:17,895 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 [2021-07-09 17:40:17,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714805271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:18,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:18,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138235362] [2021-07-09 17:40:18,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:18,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:18,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:18,079 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) [2021-07-09 17:40:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:18,339 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-07-09 17:40:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:18,339 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 [2021-07-09 17:40:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:18,340 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:40:18,340 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:40:18,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:40:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-07-09 17:40:18,343 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) [2021-07-09 17:40:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-09 17:40:18,344 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-09 17:40:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-09 17:40:18,344 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) [2021-07-09 17:40:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-09 17:40:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:18,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:18,345 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:18,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-07-09 17:40:18,545 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 349 times [2021-07-09 17:40:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:18,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822071243] [2021-07-09 17:40:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822071243] [2021-07-09 17:40:18,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822071243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58549766] [2021-07-09 17:40:18,613 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 [2021-07-09 17:40:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58549766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:18,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994990689] [2021-07-09 17:40:18,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:18,793 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) [2021-07-09 17:40:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:18,978 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-07-09 17:40:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:18,978 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 [2021-07-09 17:40:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:18,979 INFO L225 Difference]: With dead ends: 481 [2021-07-09 17:40:18,979 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:40:18,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:40:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-07-09 17:40:18,987 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) [2021-07-09 17:40:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-07-09 17:40:18,988 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-07-09 17:40:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:18,988 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-07-09 17:40:18,988 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) [2021-07-09 17:40:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-07-09 17:40:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:18,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:18,989 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:19,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,189 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 350 times [2021-07-09 17:40:19,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:19,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856620141] [2021-07-09 17:40:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856620141] [2021-07-09 17:40:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856620141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921578551] [2021-07-09 17:40:19,255 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 [2021-07-09 17:40:19,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921578551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:19,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:19,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149130215] [2021-07-09 17:40:19,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:19,430 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) [2021-07-09 17:40:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:19,710 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-07-09 17:40:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:19,710 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 [2021-07-09 17:40:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:19,711 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:40:19,711 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:40:19,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:40:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-07-09 17:40:19,715 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) [2021-07-09 17:40:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-07-09 17:40:19,715 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-07-09 17:40:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:19,715 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-07-09 17:40:19,715 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) [2021-07-09 17:40:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-07-09 17:40:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:19,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:19,716 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:19,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,916 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 351 times [2021-07-09 17:40:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:19,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719496620] [2021-07-09 17:40:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:19,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719496620] [2021-07-09 17:40:19,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719496620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185945426] [2021-07-09 17:40:19,984 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 [2021-07-09 17:40:20,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:20,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:20,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185945426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:20,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:20,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080159416] [2021-07-09 17:40:20,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:20,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:20,169 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) [2021-07-09 17:40:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:20,389 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-07-09 17:40:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:20,389 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 [2021-07-09 17:40:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:20,390 INFO L225 Difference]: With dead ends: 429 [2021-07-09 17:40:20,390 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 17:40:20,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 17:40:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-07-09 17:40:20,393 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) [2021-07-09 17:40:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-07-09 17:40:20,394 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-07-09 17:40:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-07-09 17:40:20,394 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) [2021-07-09 17:40:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-07-09 17:40:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:20,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:20,394 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:20,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:20,595 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 352 times [2021-07-09 17:40:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588832042] [2021-07-09 17:40:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588832042] [2021-07-09 17:40:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588832042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179272433] [2021-07-09 17:40:20,666 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 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 [2021-07-09 17:40:20,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:20,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179272433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:20,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:20,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961693741] [2021-07-09 17:40:20,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:20,848 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) [2021-07-09 17:40:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:21,081 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-07-09 17:40:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:21,081 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 [2021-07-09 17:40:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:21,082 INFO L225 Difference]: With dead ends: 423 [2021-07-09 17:40:21,082 INFO L226 Difference]: Without dead ends: 423 [2021-07-09 17:40:21,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:21,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-09 17:40:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-07-09 17:40:21,085 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) [2021-07-09 17:40:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-07-09 17:40:21,086 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-07-09 17:40:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:21,086 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-07-09 17:40:21,086 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) [2021-07-09 17:40:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-07-09 17:40:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:21,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:21,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:21,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-07-09 17:40:21,287 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:21,287 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 353 times [2021-07-09 17:40:21,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:21,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543807484] [2021-07-09 17:40:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:21,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543807484] [2021-07-09 17:40:21,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543807484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550575109] [2021-07-09 17:40:21,355 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 [2021-07-09 17:40:21,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550575109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:21,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979400587] [2021-07-09 17:40:21,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:21,541 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) [2021-07-09 17:40:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:21,729 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-07-09 17:40:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:21,730 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 [2021-07-09 17:40:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:21,730 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:40:21,731 INFO L226 Difference]: Without dead ends: 384 [2021-07-09 17:40:21,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-09 17:40:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-07-09 17:40:21,734 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) [2021-07-09 17:40:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-07-09 17:40:21,734 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-07-09 17:40:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:21,734 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-07-09 17:40:21,734 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) [2021-07-09 17:40:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-07-09 17:40:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:21,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:21,735 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:21,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:21,935 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 354 times [2021-07-09 17:40:21,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:21,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090099761] [2021-07-09 17:40:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090099761] [2021-07-09 17:40:22,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090099761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864768173] [2021-07-09 17:40:22,000 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 [2021-07-09 17:40:22,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864768173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250959602] [2021-07-09 17:40:22,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:22,180 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) [2021-07-09 17:40:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:22,375 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-07-09 17:40:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:22,376 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 [2021-07-09 17:40:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:22,376 INFO L225 Difference]: With dead ends: 385 [2021-07-09 17:40:22,376 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:40:22,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:40:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-07-09 17:40:22,380 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) [2021-07-09 17:40:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-07-09 17:40:22,380 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-07-09 17:40:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:22,381 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-07-09 17:40:22,381 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) [2021-07-09 17:40:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-07-09 17:40:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:22,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:22,381 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:22,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-07-09 17:40:22,582 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 355 times [2021-07-09 17:40:22,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:22,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300823024] [2021-07-09 17:40:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300823024] [2021-07-09 17:40:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300823024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949669473] [2021-07-09 17:40:22,646 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 [2021-07-09 17:40:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949669473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:22,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:22,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802261365] [2021-07-09 17:40:22,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:22,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:22,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:22,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:22,832 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) [2021-07-09 17:40:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:23,075 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-07-09 17:40:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:23,075 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 [2021-07-09 17:40:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:23,076 INFO L225 Difference]: With dead ends: 391 [2021-07-09 17:40:23,076 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 17:40:23,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 17:40:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-07-09 17:40:23,079 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) [2021-07-09 17:40:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-07-09 17:40:23,080 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-07-09 17:40:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:23,080 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-07-09 17:40:23,080 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) [2021-07-09 17:40:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-07-09 17:40:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:23,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:23,080 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:23,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:23,281 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 356 times [2021-07-09 17:40:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:23,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206559534] [2021-07-09 17:40:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206559534] [2021-07-09 17:40:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206559534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899230104] [2021-07-09 17:40:23,343 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 [2021-07-09 17:40:23,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899230104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204486686] [2021-07-09 17:40:23,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:23,518 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) [2021-07-09 17:40:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:23,724 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-07-09 17:40:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:23,724 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 [2021-07-09 17:40:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:23,725 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:40:23,725 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:40:23,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:40:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-07-09 17:40:23,728 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) [2021-07-09 17:40:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-07-09 17:40:23,728 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-07-09 17:40:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:23,728 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-07-09 17:40:23,729 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) [2021-07-09 17:40:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-07-09 17:40:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:23,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:23,729 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:23,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:23,930 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 357 times [2021-07-09 17:40:23,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:23,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661228737] [2021-07-09 17:40:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:23,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661228737] [2021-07-09 17:40:23,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661228737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271091252] [2021-07-09 17:40:23,989 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 [2021-07-09 17:40:24,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:24,125 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 12 treesize of output 8 [2021-07-09 17:40:24,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:24,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,142 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:24,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:24,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:24,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271091252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:24,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:24,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340803427] [2021-07-09 17:40:24,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:24,180 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) [2021-07-09 17:40:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:24,364 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-07-09 17:40:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:24,365 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 [2021-07-09 17:40:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:24,365 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:40:24,365 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:40:24,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:40:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-07-09 17:40:24,369 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) [2021-07-09 17:40:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-07-09 17:40:24,370 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-07-09 17:40:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:24,370 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-07-09 17:40:24,370 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) [2021-07-09 17:40:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-07-09 17:40:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:24,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:24,370 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:24,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:24,571 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 358 times [2021-07-09 17:40:24,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:24,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795380875] [2021-07-09 17:40:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:24,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:24,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795380875] [2021-07-09 17:40:24,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795380875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:24,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934577061] [2021-07-09 17:40:24,634 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 [2021-07-09 17:40:24,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:24,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:24,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,792 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:24,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:24,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934577061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:24,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:24,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:40:24,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271240852] [2021-07-09 17:40:24,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:40:24,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:40:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:40:24,826 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) [2021-07-09 17:40:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:25,017 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-07-09 17:40:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:25,017 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 [2021-07-09 17:40:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:25,018 INFO L225 Difference]: With dead ends: 481 [2021-07-09 17:40:25,018 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:40:25,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:40:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-07-09 17:40:25,022 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) [2021-07-09 17:40:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-07-09 17:40:25,022 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-07-09 17:40:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:25,022 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-07-09 17:40:25,022 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) [2021-07-09 17:40:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-07-09 17:40:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:25,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:25,023 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:25,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:25,223 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 359 times [2021-07-09 17:40:25,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:25,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46567608] [2021-07-09 17:40:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46567608] [2021-07-09 17:40:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46567608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771982930] [2021-07-09 17:40:25,283 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 [2021-07-09 17:40:25,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:25,409 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 12 treesize of output 8 [2021-07-09 17:40:25,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:40:25,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:25,426 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:40:25,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:25,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:40:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771982930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:25,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:40:25,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132452431] [2021-07-09 17:40:25,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:40:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:40:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:40:25,458 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) [2021-07-09 17:40:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:25,629 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-07-09 17:40:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:25,629 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 [2021-07-09 17:40:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:25,630 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:40:25,630 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:40:25,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:40:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-07-09 17:40:25,635 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) [2021-07-09 17:40:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-07-09 17:40:25,635 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-07-09 17:40:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:25,635 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-07-09 17:40:25,635 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) [2021-07-09 17:40:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-07-09 17:40:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:25,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:25,636 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3360,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:25,852 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 360 times [2021-07-09 17:40:25,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:25,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216903889] [2021-07-09 17:40:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216903889] [2021-07-09 17:40:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216903889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545829634] [2021-07-09 17:40:25,910 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 [2021-07-09 17:40:25,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:25,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:25,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:26,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545829634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:26,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:26,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:26,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912350352] [2021-07-09 17:40:26,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:26,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:26,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:26,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:26,069 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) [2021-07-09 17:40:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:26,238 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-07-09 17:40:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:26,238 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 [2021-07-09 17:40:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:26,239 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:40:26,239 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:40:26,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:40:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-07-09 17:40:26,242 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) [2021-07-09 17:40:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-07-09 17:40:26,243 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-07-09 17:40:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:26,243 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-07-09 17:40:26,243 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) [2021-07-09 17:40:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-07-09 17:40:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:26,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:26,243 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:26,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:26,444 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 361 times [2021-07-09 17:40:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:26,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901228037] [2021-07-09 17:40:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:26,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901228037] [2021-07-09 17:40:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901228037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903509637] [2021-07-09 17:40:26,505 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 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 [2021-07-09 17:40:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:26,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903509637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:26,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:26,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700848143] [2021-07-09 17:40:26,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:26,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:26,668 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) [2021-07-09 17:40:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:26,863 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-07-09 17:40:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:26,864 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 [2021-07-09 17:40:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:26,864 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:40:26,864 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:40:26,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:40:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-07-09 17:40:26,867 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) [2021-07-09 17:40:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-07-09 17:40:26,868 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-07-09 17:40:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:26,868 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-07-09 17:40:26,868 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) [2021-07-09 17:40:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-07-09 17:40:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:26,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:26,868 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:27,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-07-09 17:40:27,069 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 362 times [2021-07-09 17:40:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:27,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074724882] [2021-07-09 17:40:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074724882] [2021-07-09 17:40:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074724882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855395193] [2021-07-09 17:40:27,125 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 [2021-07-09 17:40:27,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855395193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:27,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:27,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594935194] [2021-07-09 17:40:27,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:27,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:27,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:27,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:27,283 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) [2021-07-09 17:40:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:27,435 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-07-09 17:40:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:27,436 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 [2021-07-09 17:40:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:27,436 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:40:27,436 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:40:27,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:40:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-07-09 17:40:27,439 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) [2021-07-09 17:40:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-07-09 17:40:27,439 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-07-09 17:40:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:27,440 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-07-09 17:40:27,440 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) [2021-07-09 17:40:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-07-09 17:40:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:27,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:27,440 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:27,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:27,640 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 363 times [2021-07-09 17:40:27,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:27,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919930904] [2021-07-09 17:40:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919930904] [2021-07-09 17:40:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919930904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63868406] [2021-07-09 17:40:27,714 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 [2021-07-09 17:40:27,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63868406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:27,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:27,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875038386] [2021-07-09 17:40:27,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:27,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:27,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:27,911 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) [2021-07-09 17:40:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:28,092 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-07-09 17:40:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:28,092 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 [2021-07-09 17:40:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:28,093 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:40:28,093 INFO L226 Difference]: Without dead ends: 406 [2021-07-09 17:40:28,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-09 17:40:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-07-09 17:40:28,096 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) [2021-07-09 17:40:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-07-09 17:40:28,096 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-07-09 17:40:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:28,096 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-07-09 17:40:28,097 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) [2021-07-09 17:40:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-07-09 17:40:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:28,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:28,097 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:28,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-07-09 17:40:28,297 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 364 times [2021-07-09 17:40:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:28,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714863267] [2021-07-09 17:40:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:28,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714863267] [2021-07-09 17:40:28,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714863267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:28,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061256555] [2021-07-09 17:40:28,356 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 [2021-07-09 17:40:28,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061256555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:28,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:28,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:28,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213921404] [2021-07-09 17:40:28,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:28,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:28,517 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) [2021-07-09 17:40:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:28,722 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-07-09 17:40:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:28,723 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 [2021-07-09 17:40:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:28,723 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:40:28,723 INFO L226 Difference]: Without dead ends: 412 [2021-07-09 17:40:28,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-09 17:40:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-07-09 17:40:28,726 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) [2021-07-09 17:40:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-07-09 17:40:28,727 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-07-09 17:40:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:28,727 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-07-09 17:40:28,727 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) [2021-07-09 17:40:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-07-09 17:40:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:28,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:28,727 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:28,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:28,928 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 365 times [2021-07-09 17:40:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:28,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010649960] [2021-07-09 17:40:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:28,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:28,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010649960] [2021-07-09 17:40:28,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010649960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:28,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785122746] [2021-07-09 17:40:28,989 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 [2021-07-09 17:40:29,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:29,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:29,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785122746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:29,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:29,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010212380] [2021-07-09 17:40:29,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:29,151 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) [2021-07-09 17:40:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:29,334 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-07-09 17:40:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:29,335 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 [2021-07-09 17:40:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:29,335 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:40:29,335 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:40:29,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:40:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-07-09 17:40:29,338 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) [2021-07-09 17:40:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-07-09 17:40:29,339 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-07-09 17:40:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:29,339 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-07-09 17:40:29,339 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) [2021-07-09 17:40:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-07-09 17:40:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:29,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:29,339 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:29,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-07-09 17:40:29,540 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 366 times [2021-07-09 17:40:29,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:29,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532499505] [2021-07-09 17:40:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:29,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:29,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532499505] [2021-07-09 17:40:29,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532499505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99036935] [2021-07-09 17:40:29,593 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 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 [2021-07-09 17:40:29,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:29,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99036935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:40:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329462774] [2021-07-09 17:40:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:40:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:40:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:40:29,735 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) [2021-07-09 17:40:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:29,900 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-07-09 17:40:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:29,901 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 [2021-07-09 17:40:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:29,901 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:40:29,901 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:40:29,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:40:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-07-09 17:40:29,904 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) [2021-07-09 17:40:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-07-09 17:40:29,905 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-07-09 17:40:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:29,905 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-07-09 17:40:29,905 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) [2021-07-09 17:40:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-07-09 17:40:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:29,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:29,905 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:30,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-07-09 17:40:30,106 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 367 times [2021-07-09 17:40:30,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:30,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195885654] [2021-07-09 17:40:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:30,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195885654] [2021-07-09 17:40:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195885654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691453687] [2021-07-09 17:40:30,175 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 [2021-07-09 17:40:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:30,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:30,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691453687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:30,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:30,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107362508] [2021-07-09 17:40:30,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:30,377 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) [2021-07-09 17:40:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:30,642 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2021-07-09 17:40:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:30,642 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 [2021-07-09 17:40:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:30,643 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:40:30,643 INFO L226 Difference]: Without dead ends: 525 [2021-07-09 17:40:30,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-09 17:40:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2021-07-09 17:40:30,647 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) [2021-07-09 17:40:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-07-09 17:40:30,647 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-07-09 17:40:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:30,647 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-07-09 17:40:30,647 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) [2021-07-09 17:40:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-07-09 17:40:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:30,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:30,648 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:30,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:30,848 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 368 times [2021-07-09 17:40:30,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:30,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304769514] [2021-07-09 17:40:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:30,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:30,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304769514] [2021-07-09 17:40:30,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304769514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696734898] [2021-07-09 17:40:30,916 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 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 [2021-07-09 17:40:31,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696734898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:31,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:31,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952153713] [2021-07-09 17:40:31,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:31,100 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) [2021-07-09 17:40:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:31,339 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-07-09 17:40:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:31,339 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 [2021-07-09 17:40:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:31,340 INFO L225 Difference]: With dead ends: 511 [2021-07-09 17:40:31,340 INFO L226 Difference]: Without dead ends: 505 [2021-07-09 17:40:31,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-09 17:40:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-07-09 17:40:31,349 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) [2021-07-09 17:40:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-07-09 17:40:31,349 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-07-09 17:40:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:31,349 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-07-09 17:40:31,350 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) [2021-07-09 17:40:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-07-09 17:40:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:31,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:31,350 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:31,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-07-09 17:40:31,551 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:31,551 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 369 times [2021-07-09 17:40:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:31,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716820900] [2021-07-09 17:40:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:31,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716820900] [2021-07-09 17:40:31,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716820900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363394731] [2021-07-09 17:40:31,643 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 [2021-07-09 17:40:31,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363394731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:31,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:31,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:31,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97300182] [2021-07-09 17:40:31,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:31,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:31,826 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) [2021-07-09 17:40:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:32,225 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-07-09 17:40:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:32,225 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 [2021-07-09 17:40:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:32,226 INFO L225 Difference]: With dead ends: 582 [2021-07-09 17:40:32,226 INFO L226 Difference]: Without dead ends: 582 [2021-07-09 17:40:32,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-09 17:40:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-07-09 17:40:32,230 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) [2021-07-09 17:40:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-09 17:40:32,231 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-09 17:40:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:32,231 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-09 17:40:32,231 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) [2021-07-09 17:40:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-09 17:40:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:32,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:32,232 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:32,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:32,435 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 370 times [2021-07-09 17:40:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831931787] [2021-07-09 17:40:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:32,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831931787] [2021-07-09 17:40:32,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831931787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060696199] [2021-07-09 17:40:32,506 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 [2021-07-09 17:40:32,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:32,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060696199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:32,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:32,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879962503] [2021-07-09 17:40:32,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:32,695 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) [2021-07-09 17:40:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:33,128 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-07-09 17:40:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:33,129 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 [2021-07-09 17:40:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:33,129 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:40:33,129 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 17:40:33,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 17:40:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-07-09 17:40:33,133 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) [2021-07-09 17:40:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-07-09 17:40:33,134 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-07-09 17:40:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:33,134 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-07-09 17:40:33,134 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) [2021-07-09 17:40:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-07-09 17:40:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:33,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:33,134 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:33,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-07-09 17:40:33,335 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:33,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 371 times [2021-07-09 17:40:33,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:33,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415875095] [2021-07-09 17:40:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:33,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415875095] [2021-07-09 17:40:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415875095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:33,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75266828] [2021-07-09 17:40:33,412 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 [2021-07-09 17:40:33,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:33,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75266828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:33,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:33,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714073352] [2021-07-09 17:40:33,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:33,610 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) [2021-07-09 17:40:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:34,010 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-07-09 17:40:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:34,010 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 [2021-07-09 17:40:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:34,011 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:40:34,011 INFO L226 Difference]: Without dead ends: 542 [2021-07-09 17:40:34,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-09 17:40:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-07-09 17:40:34,015 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) [2021-07-09 17:40:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-07-09 17:40:34,015 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-07-09 17:40:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:34,016 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-07-09 17:40:34,016 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) [2021-07-09 17:40:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-07-09 17:40:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:34,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:34,016 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:34,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:34,217 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 372 times [2021-07-09 17:40:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:34,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232947826] [2021-07-09 17:40:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:34,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232947826] [2021-07-09 17:40:34,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232947826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051560613] [2021-07-09 17:40:34,301 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 [2021-07-09 17:40:34,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051560613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:34,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:34,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:34,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299952022] [2021-07-09 17:40:34,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:34,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:34,505 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) [2021-07-09 17:40:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:34,939 INFO L93 Difference]: Finished difference Result 531 states and 1517 transitions. [2021-07-09 17:40:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:34,939 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 [2021-07-09 17:40:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:34,940 INFO L225 Difference]: With dead ends: 531 [2021-07-09 17:40:34,940 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:40:34,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:40:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-07-09 17:40:34,944 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) [2021-07-09 17:40:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-07-09 17:40:34,944 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-07-09 17:40:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:34,945 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-07-09 17:40:34,945 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) [2021-07-09 17:40:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-07-09 17:40:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:34,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:34,945 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:35,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:35,146 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 373 times [2021-07-09 17:40:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:35,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557714284] [2021-07-09 17:40:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:35,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557714284] [2021-07-09 17:40:35,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557714284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880802270] [2021-07-09 17:40:35,215 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 [2021-07-09 17:40:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880802270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:35,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:35,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:35,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108941326] [2021-07-09 17:40:35,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:35,400 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) [2021-07-09 17:40:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:35,680 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-07-09 17:40:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:35,680 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 [2021-07-09 17:40:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:35,681 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:40:35,681 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:40:35,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:40:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-07-09 17:40:35,685 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) [2021-07-09 17:40:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-07-09 17:40:35,685 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-07-09 17:40:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:35,685 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-07-09 17:40:35,685 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) [2021-07-09 17:40:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-07-09 17:40:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:35,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:35,686 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:35,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-07-09 17:40:35,886 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:35,887 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 374 times [2021-07-09 17:40:35,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:35,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204915603] [2021-07-09 17:40:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:35,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204915603] [2021-07-09 17:40:35,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204915603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:35,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415076401] [2021-07-09 17:40:35,969 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 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 [2021-07-09 17:40:36,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:36,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415076401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:36,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:36,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333585135] [2021-07-09 17:40:36,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:36,163 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) [2021-07-09 17:40:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:36,498 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-07-09 17:40:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:36,498 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 [2021-07-09 17:40:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:36,499 INFO L225 Difference]: With dead ends: 502 [2021-07-09 17:40:36,499 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:40:36,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:40:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-07-09 17:40:36,503 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) [2021-07-09 17:40:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-07-09 17:40:36,503 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-07-09 17:40:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:36,503 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-07-09 17:40:36,503 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) [2021-07-09 17:40:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-07-09 17:40:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:36,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:36,504 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:36,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:36,704 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 375 times [2021-07-09 17:40:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115749412] [2021-07-09 17:40:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:36,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:36,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115749412] [2021-07-09 17:40:36,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115749412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:36,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452843484] [2021-07-09 17:40:36,772 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 [2021-07-09 17:40:36,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452843484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:36,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:36,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552057574] [2021-07-09 17:40:36,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:36,954 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) [2021-07-09 17:40:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:37,218 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-07-09 17:40:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:37,219 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 [2021-07-09 17:40:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:37,220 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:40:37,220 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:40:37,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:40:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-07-09 17:40:37,223 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) [2021-07-09 17:40:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-07-09 17:40:37,223 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-07-09 17:40:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:37,224 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-07-09 17:40:37,224 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) [2021-07-09 17:40:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-07-09 17:40:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:37,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:37,224 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:37,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:37,425 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 376 times [2021-07-09 17:40:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:37,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320059846] [2021-07-09 17:40:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:37,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320059846] [2021-07-09 17:40:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320059846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304239137] [2021-07-09 17:40:37,505 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 [2021-07-09 17:40:37,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:37,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304239137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:37,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:37,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:37,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460299075] [2021-07-09 17:40:37,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:37,689 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) [2021-07-09 17:40:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:37,938 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-07-09 17:40:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:37,939 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 [2021-07-09 17:40:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:37,939 INFO L225 Difference]: With dead ends: 478 [2021-07-09 17:40:37,939 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:40:37,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:40:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-07-09 17:40:37,943 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) [2021-07-09 17:40:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-09 17:40:37,943 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-09 17:40:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:37,944 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-09 17:40:37,944 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) [2021-07-09 17:40:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-09 17:40:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:37,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:37,944 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:38,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:38,145 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 377 times [2021-07-09 17:40:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:38,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096678398] [2021-07-09 17:40:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:38,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:38,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096678398] [2021-07-09 17:40:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096678398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:38,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799378703] [2021-07-09 17:40:38,213 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 [2021-07-09 17:40:38,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:38,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799378703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378140492] [2021-07-09 17:40:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:38,396 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) [2021-07-09 17:40:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:38,716 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-07-09 17:40:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:38,716 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 [2021-07-09 17:40:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:38,717 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:40:38,717 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:40:38,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:40:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-07-09 17:40:38,720 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) [2021-07-09 17:40:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-07-09 17:40:38,721 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-07-09 17:40:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:38,721 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-07-09 17:40:38,721 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) [2021-07-09 17:40:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-07-09 17:40:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:38,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:38,722 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:38,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:38,922 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 378 times [2021-07-09 17:40:38,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:38,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896864798] [2021-07-09 17:40:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:38,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896864798] [2021-07-09 17:40:38,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896864798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62767214] [2021-07-09 17:40:38,989 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 [2021-07-09 17:40:39,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:39,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:39,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62767214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:39,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:39,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385399222] [2021-07-09 17:40:39,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:39,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:39,180 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) [2021-07-09 17:40:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:39,429 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-07-09 17:40:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:39,429 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 [2021-07-09 17:40:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:39,430 INFO L225 Difference]: With dead ends: 459 [2021-07-09 17:40:39,430 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:40:39,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:40:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-07-09 17:40:39,434 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) [2021-07-09 17:40:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-07-09 17:40:39,434 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-07-09 17:40:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:39,434 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-07-09 17:40:39,434 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) [2021-07-09 17:40:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-07-09 17:40:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:39,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:39,435 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:39,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-07-09 17:40:39,635 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 379 times [2021-07-09 17:40:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:39,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171402545] [2021-07-09 17:40:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:39,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171402545] [2021-07-09 17:40:39,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171402545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186887278] [2021-07-09 17:40:39,701 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 [2021-07-09 17:40:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186887278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169463528] [2021-07-09 17:40:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:39,894 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) [2021-07-09 17:40:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:40,153 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-07-09 17:40:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:40,153 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 [2021-07-09 17:40:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:40,154 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:40:40,154 INFO L226 Difference]: Without dead ends: 556 [2021-07-09 17:40:40,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-09 17:40:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-07-09 17:40:40,158 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) [2021-07-09 17:40:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-07-09 17:40:40,159 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-07-09 17:40:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-07-09 17:40:40,159 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) [2021-07-09 17:40:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-07-09 17:40:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:40,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:40,159 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:40,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3490,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:40,360 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 380 times [2021-07-09 17:40:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:40,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932249412] [2021-07-09 17:40:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:40,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:40,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932249412] [2021-07-09 17:40:40,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932249412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:40,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103472372] [2021-07-09 17:40:40,428 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 [2021-07-09 17:40:40,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103472372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:40,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:40,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737650217] [2021-07-09 17:40:40,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:40,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:40,612 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) [2021-07-09 17:40:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:40,964 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-07-09 17:40:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:40,965 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 [2021-07-09 17:40:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:40,966 INFO L225 Difference]: With dead ends: 558 [2021-07-09 17:40:40,966 INFO L226 Difference]: Without dead ends: 558 [2021-07-09 17:40:40,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-09 17:40:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-07-09 17:40:40,971 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) [2021-07-09 17:40:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-07-09 17:40:40,972 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-07-09 17:40:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:40,972 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-07-09 17:40:40,972 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) [2021-07-09 17:40:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-07-09 17:40:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:40,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:40,973 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:41,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3496 [2021-07-09 17:40:41,177 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 381 times [2021-07-09 17:40:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:41,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604762184] [2021-07-09 17:40:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:41,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604762184] [2021-07-09 17:40:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604762184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602808295] [2021-07-09 17:40:41,244 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 [2021-07-09 17:40:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:41,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:41,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602808295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:41,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:40:41,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059086876] [2021-07-09 17:40:41,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:41,430 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) [2021-07-09 17:40:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:41,686 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-07-09 17:40:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:41,687 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 [2021-07-09 17:40:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:41,688 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:40:41,688 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:40:41,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:40:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-07-09 17:40:41,693 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) [2021-07-09 17:40:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-07-09 17:40:41,693 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-07-09 17:40:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:41,694 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-07-09 17:40:41,694 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) [2021-07-09 17:40:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-07-09 17:40:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:41,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:41,694 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:41,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:41,895 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 382 times [2021-07-09 17:40:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244641219] [2021-07-09 17:40:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:41,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244641219] [2021-07-09 17:40:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244641219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664419276] [2021-07-09 17:40:41,954 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 [2021-07-09 17:40:42,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664419276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:42,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:42,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:42,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343079115] [2021-07-09 17:40:42,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:42,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:42,128 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) [2021-07-09 17:40:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:42,356 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-07-09 17:40:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:42,356 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 [2021-07-09 17:40:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:42,357 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:40:42,357 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:40:42,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:40:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-07-09 17:40:42,361 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) [2021-07-09 17:40:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-07-09 17:40:42,362 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-07-09 17:40:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:42,362 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-07-09 17:40:42,362 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) [2021-07-09 17:40:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-07-09 17:40:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:42,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:42,362 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:42,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3506,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:42,563 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 383 times [2021-07-09 17:40:42,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:42,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051626080] [2021-07-09 17:40:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:42,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051626080] [2021-07-09 17:40:42,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051626080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726426470] [2021-07-09 17:40:42,623 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 [2021-07-09 17:40:42,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:42,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:42,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:42,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:42,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726426470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:42,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:42,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614240522] [2021-07-09 17:40:42,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:42,792 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) [2021-07-09 17:40:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:43,033 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-07-09 17:40:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:43,033 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 [2021-07-09 17:40:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:43,034 INFO L225 Difference]: With dead ends: 442 [2021-07-09 17:40:43,034 INFO L226 Difference]: Without dead ends: 436 [2021-07-09 17:40:43,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-09 17:40:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-07-09 17:40:43,038 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) [2021-07-09 17:40:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-07-09 17:40:43,038 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-07-09 17:40:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:43,038 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-07-09 17:40:43,038 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) [2021-07-09 17:40:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-07-09 17:40:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:43,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:43,039 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:43,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,239 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:43,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 384 times [2021-07-09 17:40:43,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:43,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527214985] [2021-07-09 17:40:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:43,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:43,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527214985] [2021-07-09 17:40:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527214985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:43,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235176099] [2021-07-09 17:40:43,300 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 [2021-07-09 17:40:43,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:43,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:43,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235176099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:43,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:43,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:43,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920285089] [2021-07-09 17:40:43,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:43,472 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) [2021-07-09 17:40:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:43,793 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-07-09 17:40:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:43,793 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 [2021-07-09 17:40:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:43,794 INFO L225 Difference]: With dead ends: 448 [2021-07-09 17:40:43,794 INFO L226 Difference]: Without dead ends: 448 [2021-07-09 17:40:43,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-09 17:40:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-07-09 17:40:43,797 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) [2021-07-09 17:40:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-07-09 17:40:43,798 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-07-09 17:40:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:43,798 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-07-09 17:40:43,798 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) [2021-07-09 17:40:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-07-09 17:40:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:43,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:43,798 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:43,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,999 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 385 times [2021-07-09 17:40:43,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:43,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608161380] [2021-07-09 17:40:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608161380] [2021-07-09 17:40:44,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608161380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886005673] [2021-07-09 17:40:44,060 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 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 [2021-07-09 17:40:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886005673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:44,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:40:44,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848462904] [2021-07-09 17:40:44,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:40:44,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:44,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:40:44,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:40:44,221 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) [2021-07-09 17:40:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:44,473 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-07-09 17:40:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:44,473 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 [2021-07-09 17:40:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:44,474 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:40:44,474 INFO L226 Difference]: Without dead ends: 431 [2021-07-09 17:40:44,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-09 17:40:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-07-09 17:40:44,477 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) [2021-07-09 17:40:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-07-09 17:40:44,478 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-07-09 17:40:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:44,478 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-07-09 17:40:44,478 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) [2021-07-09 17:40:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-07-09 17:40:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:44,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:44,478 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:44,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-07-09 17:40:44,679 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 386 times [2021-07-09 17:40:44,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:44,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043183928] [2021-07-09 17:40:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043183928] [2021-07-09 17:40:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043183928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464061792] [2021-07-09 17:40:44,736 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 [2021-07-09 17:40:44,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:44,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464061792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:44,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:40:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803348732] [2021-07-09 17:40:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:40:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:40:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:40:44,885 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) [2021-07-09 17:40:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:45,117 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-07-09 17:40:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:45,118 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 [2021-07-09 17:40:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:45,118 INFO L225 Difference]: With dead ends: 456 [2021-07-09 17:40:45,118 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:40:45,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:40:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-07-09 17:40:45,122 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) [2021-07-09 17:40:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-07-09 17:40:45,122 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-07-09 17:40:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:45,123 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-07-09 17:40:45,123 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) [2021-07-09 17:40:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-07-09 17:40:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:45,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:45,123 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:45,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:45,324 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 387 times [2021-07-09 17:40:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:45,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775374349] [2021-07-09 17:40:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:45,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:45,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775374349] [2021-07-09 17:40:45,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775374349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:45,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415971087] [2021-07-09 17:40:45,394 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 [2021-07-09 17:40:45,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:45,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:45,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415971087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:45,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:45,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:45,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748770012] [2021-07-09 17:40:45,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:45,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:45,642 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) [2021-07-09 17:40:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:45,921 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-07-09 17:40:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:45,921 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 [2021-07-09 17:40:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:45,922 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:40:45,922 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:40:45,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:40:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-07-09 17:40:45,925 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) [2021-07-09 17:40:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-07-09 17:40:45,925 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-07-09 17:40:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:45,925 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-07-09 17:40:45,926 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) [2021-07-09 17:40:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-07-09 17:40:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:45,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:45,926 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:46,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-07-09 17:40:46,126 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 388 times [2021-07-09 17:40:46,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:46,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934810725] [2021-07-09 17:40:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:46,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934810725] [2021-07-09 17:40:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934810725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619496116] [2021-07-09 17:40:46,197 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 [2021-07-09 17:40:46,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:46,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:46,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619496116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:46,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:46,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33340694] [2021-07-09 17:40:46,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:46,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:46,425 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) [2021-07-09 17:40:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:46,745 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-07-09 17:40:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:46,746 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 [2021-07-09 17:40:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:46,746 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:40:46,746 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:40:46,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:40:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-07-09 17:40:46,749 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) [2021-07-09 17:40:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-07-09 17:40:46,750 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-07-09 17:40:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:46,750 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-07-09 17:40:46,750 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) [2021-07-09 17:40:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-07-09 17:40:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:46,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:46,750 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:46,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:46,951 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 389 times [2021-07-09 17:40:46,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:46,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733825406] [2021-07-09 17:40:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733825406] [2021-07-09 17:40:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733825406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769627009] [2021-07-09 17:40:47,010 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 [2021-07-09 17:40:47,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:47,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769627009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:47,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:47,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709085077] [2021-07-09 17:40:47,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:47,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:47,249 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) [2021-07-09 17:40:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:47,638 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-07-09 17:40:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:47,638 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 [2021-07-09 17:40:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:47,639 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:40:47,639 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:40:47,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:40:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-07-09 17:40:47,642 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) [2021-07-09 17:40:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-09 17:40:47,642 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-07-09 17:40:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:47,642 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-09 17:40:47,642 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) [2021-07-09 17:40:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-09 17:40:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:47,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:47,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:47,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-07-09 17:40:47,843 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 390 times [2021-07-09 17:40:47,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:47,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29649707] [2021-07-09 17:40:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29649707] [2021-07-09 17:40:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29649707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199793985] [2021-07-09 17:40:47,918 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 [2021-07-09 17:40:48,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:48,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:48,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:48,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199793985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:48,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:48,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664504997] [2021-07-09 17:40:48,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:48,147 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) [2021-07-09 17:40:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:48,432 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-07-09 17:40:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:48,432 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 [2021-07-09 17:40:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:48,433 INFO L225 Difference]: With dead ends: 456 [2021-07-09 17:40:48,433 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:40:48,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:40:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-07-09 17:40:48,436 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) [2021-07-09 17:40:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-07-09 17:40:48,437 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-07-09 17:40:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:48,437 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-07-09 17:40:48,437 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) [2021-07-09 17:40:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-07-09 17:40:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:48,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:48,437 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:48,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-09 17:40:48,638 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 391 times [2021-07-09 17:40:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:48,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692595527] [2021-07-09 17:40:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:48,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692595527] [2021-07-09 17:40:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692595527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953948468] [2021-07-09 17:40:48,708 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 [2021-07-09 17:40:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:48,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:48,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953948468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:48,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595576649] [2021-07-09 17:40:48,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:48,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:48,934 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) [2021-07-09 17:40:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:49,202 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-07-09 17:40:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:49,203 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 [2021-07-09 17:40:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:49,203 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:40:49,203 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:40:49,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:40:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-07-09 17:40:49,207 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) [2021-07-09 17:40:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-07-09 17:40:49,207 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-07-09 17:40:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:49,207 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-07-09 17:40:49,207 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) [2021-07-09 17:40:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-07-09 17:40:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:49,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:49,208 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:49,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:49,408 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 392 times [2021-07-09 17:40:49,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:49,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717902489] [2021-07-09 17:40:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:49,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:49,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717902489] [2021-07-09 17:40:49,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717902489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:49,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017066372] [2021-07-09 17:40:49,481 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 [2021-07-09 17:40:49,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:49,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:49,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:49,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017066372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:49,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:49,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74369754] [2021-07-09 17:40:49,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:49,732 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) [2021-07-09 17:40:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:50,051 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-07-09 17:40:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:50,051 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 [2021-07-09 17:40:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:50,052 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:40:50,052 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:40:50,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:40:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-07-09 17:40:50,060 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) [2021-07-09 17:40:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-07-09 17:40:50,061 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-07-09 17:40:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:50,061 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-07-09 17:40:50,061 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) [2021-07-09 17:40:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-07-09 17:40:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:50,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:50,061 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:50,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:50,262 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 393 times [2021-07-09 17:40:50,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:50,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45056565] [2021-07-09 17:40:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:50,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45056565] [2021-07-09 17:40:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45056565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585693512] [2021-07-09 17:40:50,334 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 [2021-07-09 17:40:50,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:50,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585693512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:50,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:50,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:50,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248362472] [2021-07-09 17:40:50,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:50,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:50,562 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) [2021-07-09 17:40:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:50,846 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-07-09 17:40:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:50,846 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 [2021-07-09 17:40:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:50,847 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:40:50,847 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:40:50,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:40:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-07-09 17:40:50,850 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) [2021-07-09 17:40:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-07-09 17:40:50,850 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-07-09 17:40:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:50,850 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-07-09 17:40:50,850 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) [2021-07-09 17:40:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-07-09 17:40:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:50,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:50,851 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:51,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:51,051 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 394 times [2021-07-09 17:40:51,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:51,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723994528] [2021-07-09 17:40:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723994528] [2021-07-09 17:40:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723994528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54841533] [2021-07-09 17:40:51,120 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 [2021-07-09 17:40:51,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:51,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:51,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54841533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:51,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697715577] [2021-07-09 17:40:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:51,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:51,355 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) [2021-07-09 17:40:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:51,613 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-07-09 17:40:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:51,613 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 [2021-07-09 17:40:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:51,614 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:40:51,614 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:40:51,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:40:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-07-09 17:40:51,617 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) [2021-07-09 17:40:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-07-09 17:40:51,618 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-07-09 17:40:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:51,618 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-07-09 17:40:51,618 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) [2021-07-09 17:40:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-07-09 17:40:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:51,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:51,619 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:51,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-07-09 17:40:51,819 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 395 times [2021-07-09 17:40:51,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:51,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795783321] [2021-07-09 17:40:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:51,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:51,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795783321] [2021-07-09 17:40:51,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795783321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:51,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555222500] [2021-07-09 17:40:51,890 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 [2021-07-09 17:40:51,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:51,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555222500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:52,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:52,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992410743] [2021-07-09 17:40:52,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:52,126 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) [2021-07-09 17:40:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:52,444 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-07-09 17:40:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:52,444 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 [2021-07-09 17:40:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:52,445 INFO L225 Difference]: With dead ends: 401 [2021-07-09 17:40:52,445 INFO L226 Difference]: Without dead ends: 401 [2021-07-09 17:40:52,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-09 17:40:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-07-09 17:40:52,448 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) [2021-07-09 17:40:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-09 17:40:52,449 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-07-09 17:40:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:52,449 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-09 17:40:52,449 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) [2021-07-09 17:40:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-09 17:40:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:52,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:52,449 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:52,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:52,650 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 396 times [2021-07-09 17:40:52,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:52,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776584945] [2021-07-09 17:40:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:52,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:52,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776584945] [2021-07-09 17:40:52,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776584945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:52,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975197219] [2021-07-09 17:40:52,707 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 [2021-07-09 17:40:52,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:52,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975197219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:52,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:52,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665446167] [2021-07-09 17:40:52,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:52,942 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) [2021-07-09 17:40:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:53,331 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-07-09 17:40:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:53,332 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 [2021-07-09 17:40:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:53,332 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:40:53,332 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:40:53,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:40:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-07-09 17:40:53,335 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) [2021-07-09 17:40:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-07-09 17:40:53,336 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-07-09 17:40:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:53,336 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-07-09 17:40:53,336 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) [2021-07-09 17:40:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-07-09 17:40:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:53,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:53,336 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:53,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-07-09 17:40:53,537 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 397 times [2021-07-09 17:40:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057881474] [2021-07-09 17:40:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:53,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:53,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057881474] [2021-07-09 17:40:53,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057881474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:53,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131207823] [2021-07-09 17:40:53,602 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 [2021-07-09 17:40:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:53,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131207823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:53,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:53,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:53,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043447736] [2021-07-09 17:40:53,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:53,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:53,873 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) [2021-07-09 17:40:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:54,264 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-07-09 17:40:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:54,264 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 [2021-07-09 17:40:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:54,265 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:40:54,265 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:40:54,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:40:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-07-09 17:40:54,268 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) [2021-07-09 17:40:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-07-09 17:40:54,269 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-07-09 17:40:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:54,269 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-07-09 17:40:54,269 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) [2021-07-09 17:40:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-07-09 17:40:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:54,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:54,269 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:54,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:54,470 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 398 times [2021-07-09 17:40:54,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:54,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515771468] [2021-07-09 17:40:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:54,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:54,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515771468] [2021-07-09 17:40:54,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515771468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:54,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759244244] [2021-07-09 17:40:54,532 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 [2021-07-09 17:40:54,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759244244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:54,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:54,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555916545] [2021-07-09 17:40:54,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:54,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:54,784 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) [2021-07-09 17:40:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:55,126 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-07-09 17:40:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:55,126 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 [2021-07-09 17:40:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:55,127 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:40:55,127 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:40:55,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:40:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-07-09 17:40:55,130 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) [2021-07-09 17:40:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-09 17:40:55,130 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-09 17:40:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:55,130 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-09 17:40:55,130 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) [2021-07-09 17:40:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-09 17:40:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:55,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:55,131 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:55,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:55,331 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 399 times [2021-07-09 17:40:55,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:55,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157762202] [2021-07-09 17:40:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:55,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:55,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157762202] [2021-07-09 17:40:55,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157762202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:55,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89564505] [2021-07-09 17:40:55,395 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 [2021-07-09 17:40:55,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:55,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89564505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:55,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:55,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251321752] [2021-07-09 17:40:55,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:55,624 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) [2021-07-09 17:40:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:55,838 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2021-07-09 17:40:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:55,838 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 [2021-07-09 17:40:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:55,839 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:40:55,839 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:40:55,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:40:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2021-07-09 17:40:55,842 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) [2021-07-09 17:40:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-07-09 17:40:55,842 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-07-09 17:40:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:55,842 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-07-09 17:40:55,843 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) [2021-07-09 17:40:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-07-09 17:40:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:55,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:55,843 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:56,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:56,043 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 400 times [2021-07-09 17:40:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:56,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37313103] [2021-07-09 17:40:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:56,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:56,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37313103] [2021-07-09 17:40:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37313103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:56,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052530497] [2021-07-09 17:40:56,106 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 [2021-07-09 17:40:56,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:56,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052530497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:56,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:56,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:56,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639008514] [2021-07-09 17:40:56,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:56,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:56,333 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) [2021-07-09 17:40:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:56,503 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-07-09 17:40:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:40:56,503 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 [2021-07-09 17:40:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:56,504 INFO L225 Difference]: With dead ends: 420 [2021-07-09 17:40:56,504 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:40:56,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:40:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-07-09 17:40:56,507 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) [2021-07-09 17:40:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-09 17:40:56,508 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-09 17:40:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:56,508 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-09 17:40:56,508 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) [2021-07-09 17:40:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-09 17:40:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:56,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:56,509 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:56,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:56,709 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 401 times [2021-07-09 17:40:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:56,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243695674] [2021-07-09 17:40:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:56,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:56,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243695674] [2021-07-09 17:40:56,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243695674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:56,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266085460] [2021-07-09 17:40:56,775 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 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 [2021-07-09 17:40:56,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:56,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:56,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266085460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:56,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:56,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:56,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609640902] [2021-07-09 17:40:56,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:56,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:56,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:56,990 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) [2021-07-09 17:40:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:57,253 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-07-09 17:40:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:57,253 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 [2021-07-09 17:40:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:57,254 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:40:57,254 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:40:57,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:40:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-07-09 17:40:57,258 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) [2021-07-09 17:40:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-07-09 17:40:57,258 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-07-09 17:40:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:57,258 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-07-09 17:40:57,258 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) [2021-07-09 17:40:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-07-09 17:40:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:57,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:57,259 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:57,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-07-09 17:40:57,459 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 402 times [2021-07-09 17:40:57,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:57,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005699153] [2021-07-09 17:40:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:57,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005699153] [2021-07-09 17:40:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005699153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934442295] [2021-07-09 17:40:57,525 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 [2021-07-09 17:40:57,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934442295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:57,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:57,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714523779] [2021-07-09 17:40:57,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:57,738 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) [2021-07-09 17:40:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:58,024 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-07-09 17:40:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:58,025 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 [2021-07-09 17:40:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:58,025 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:40:58,025 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:40:58,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:40:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-07-09 17:40:58,029 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) [2021-07-09 17:40:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-09 17:40:58,029 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-09 17:40:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:58,029 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-09 17:40:58,029 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) [2021-07-09 17:40:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-09 17:40:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:58,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:58,030 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:58,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-07-09 17:40:58,230 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 403 times [2021-07-09 17:40:58,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:58,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497153697] [2021-07-09 17:40:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:58,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497153697] [2021-07-09 17:40:58,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497153697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579863531] [2021-07-09 17:40:58,292 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 [2021-07-09 17:40:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:58,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579863531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:58,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907229192] [2021-07-09 17:40:58,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:58,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:58,549 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) [2021-07-09 17:40:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:58,809 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-07-09 17:40:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:58,809 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 [2021-07-09 17:40:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:58,810 INFO L225 Difference]: With dead ends: 460 [2021-07-09 17:40:58,810 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:40:58,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:40:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-07-09 17:40:58,813 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) [2021-07-09 17:40:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-07-09 17:40:58,814 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-07-09 17:40:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:58,814 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-07-09 17:40:58,814 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) [2021-07-09 17:40:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-07-09 17:40:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:58,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:58,814 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:59,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-07-09 17:40:59,015 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 404 times [2021-07-09 17:40:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:59,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215617270] [2021-07-09 17:40:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:59,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215617270] [2021-07-09 17:40:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215617270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:59,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166491435] [2021-07-09 17:40:59,079 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 [2021-07-09 17:40:59,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:59,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:59,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166491435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:59,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:59,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:40:59,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911010766] [2021-07-09 17:40:59,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:40:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:40:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:40:59,311 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) [2021-07-09 17:40:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:59,593 INFO L93 Difference]: Finished difference Result 443 states and 1266 transitions. [2021-07-09 17:40:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:40:59,594 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 [2021-07-09 17:40:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:59,594 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:40:59,594 INFO L226 Difference]: Without dead ends: 443 [2021-07-09 17:40:59,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-09 17:40:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-07-09 17:40:59,598 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) [2021-07-09 17:40:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-07-09 17:40:59,598 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-07-09 17:40:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-07-09 17:40:59,598 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) [2021-07-09 17:40:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-07-09 17:40:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:59,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:59,599 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:59,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-07-09 17:40:59,799 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 405 times [2021-07-09 17:40:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:59,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228748783] [2021-07-09 17:40:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:59,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:59,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228748783] [2021-07-09 17:40:59,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228748783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:59,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273462076] [2021-07-09 17:40:59,865 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 [2021-07-09 17:40:59,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:40:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:00,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273462076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:00,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:00,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:00,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911387971] [2021-07-09 17:41:00,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:00,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:00,073 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) [2021-07-09 17:41:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:00,244 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-07-09 17:41:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:00,244 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 [2021-07-09 17:41:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:00,245 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:41:00,245 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:41:00,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:41:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-07-09 17:41:00,248 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) [2021-07-09 17:41:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-07-09 17:41:00,248 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-07-09 17:41:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:00,248 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-07-09 17:41:00,249 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) [2021-07-09 17:41:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-07-09 17:41:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:00,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:00,249 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:00,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:00,449 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:00,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 406 times [2021-07-09 17:41:00,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:00,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906952800] [2021-07-09 17:41:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:00,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906952800] [2021-07-09 17:41:00,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906952800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049992863] [2021-07-09 17:41:00,542 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 [2021-07-09 17:41:00,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:00,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049992863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:00,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:00,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171884967] [2021-07-09 17:41:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:00,810 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) [2021-07-09 17:41:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:01,036 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-07-09 17:41:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:01,036 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 [2021-07-09 17:41:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:01,037 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:41:01,037 INFO L226 Difference]: Without dead ends: 384 [2021-07-09 17:41:01,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-09 17:41:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-07-09 17:41:01,040 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) [2021-07-09 17:41:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-07-09 17:41:01,041 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-07-09 17:41:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:01,041 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-07-09 17:41:01,041 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) [2021-07-09 17:41:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-07-09 17:41:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:01,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:01,041 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:01,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-09 17:41:01,242 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 407 times [2021-07-09 17:41:01,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:01,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009036980] [2021-07-09 17:41:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:01,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009036980] [2021-07-09 17:41:01,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009036980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133922287] [2021-07-09 17:41:01,312 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 [2021-07-09 17:41:01,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:01,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133922287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:01,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787262031] [2021-07-09 17:41:01,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:01,519 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) [2021-07-09 17:41:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:01,710 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-07-09 17:41:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:01,710 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 [2021-07-09 17:41:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:01,711 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:41:01,711 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:41:01,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:41:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-07-09 17:41:01,714 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) [2021-07-09 17:41:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-07-09 17:41:01,714 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-07-09 17:41:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:01,714 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-07-09 17:41:01,714 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) [2021-07-09 17:41:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-07-09 17:41:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:01,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:01,715 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:01,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3719 [2021-07-09 17:41:01,915 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 408 times [2021-07-09 17:41:01,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:01,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480714929] [2021-07-09 17:41:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480714929] [2021-07-09 17:41:01,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480714929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056492778] [2021-07-09 17:41:01,976 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 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 [2021-07-09 17:41:02,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:02,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:02,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:02,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056492778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:02,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079619563] [2021-07-09 17:41:02,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:02,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:02,184 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) [2021-07-09 17:41:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:02,371 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-07-09 17:41:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:02,371 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 [2021-07-09 17:41:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:02,372 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:41:02,372 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:41:02,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:41:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-07-09 17:41:02,375 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) [2021-07-09 17:41:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-07-09 17:41:02,376 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-07-09 17:41:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:02,376 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-07-09 17:41:02,376 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) [2021-07-09 17:41:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-07-09 17:41:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:02,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:02,376 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:02,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:02,577 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 409 times [2021-07-09 17:41:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:02,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73116082] [2021-07-09 17:41:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73116082] [2021-07-09 17:41:02,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73116082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870663237] [2021-07-09 17:41:02,638 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 [2021-07-09 17:41:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:02,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:02,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870663237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:02,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956109948] [2021-07-09 17:41:02,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:02,855 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) [2021-07-09 17:41:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:03,102 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-07-09 17:41:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:03,102 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 [2021-07-09 17:41:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:03,103 INFO L225 Difference]: With dead ends: 390 [2021-07-09 17:41:03,103 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:41:03,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:41:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-07-09 17:41:03,106 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) [2021-07-09 17:41:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-07-09 17:41:03,106 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-07-09 17:41:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:03,106 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-07-09 17:41:03,106 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) [2021-07-09 17:41:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-07-09 17:41:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:03,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:03,107 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:03,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-07-09 17:41:03,307 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 410 times [2021-07-09 17:41:03,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:03,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075607429] [2021-07-09 17:41:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:03,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:03,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075607429] [2021-07-09 17:41:03,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075607429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:03,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867646236] [2021-07-09 17:41:03,385 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 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 [2021-07-09 17:41:03,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:03,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:03,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867646236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:03,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:03,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:03,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993747982] [2021-07-09 17:41:03,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:03,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:03,614 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) [2021-07-09 17:41:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:03,818 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-07-09 17:41:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:03,819 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 [2021-07-09 17:41:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:03,819 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:41:03,819 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:41:03,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:41:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-07-09 17:41:03,822 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) [2021-07-09 17:41:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-09 17:41:03,823 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-09 17:41:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:03,823 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-09 17:41:03,823 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) [2021-07-09 17:41:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-09 17:41:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:03,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:03,823 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:04,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:04,024 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 411 times [2021-07-09 17:41:04,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:04,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474555516] [2021-07-09 17:41:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:04,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474555516] [2021-07-09 17:41:04,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474555516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048684418] [2021-07-09 17:41:04,077 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 [2021-07-09 17:41:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:04,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048684418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:04,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:04,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786127403] [2021-07-09 17:41:04,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:04,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:04,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:04,292 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) [2021-07-09 17:41:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:04,558 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-07-09 17:41:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:04,559 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 [2021-07-09 17:41:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:04,559 INFO L225 Difference]: With dead ends: 331 [2021-07-09 17:41:04,559 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:41:04,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:41:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-07-09 17:41:04,562 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) [2021-07-09 17:41:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-09 17:41:04,562 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-09 17:41:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-09 17:41:04,562 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) [2021-07-09 17:41:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-09 17:41:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:04,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:04,563 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:04,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3753 [2021-07-09 17:41:04,763 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 412 times [2021-07-09 17:41:04,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:04,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609168826] [2021-07-09 17:41:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:04,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609168826] [2021-07-09 17:41:04,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609168826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:04,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856835352] [2021-07-09 17:41:04,817 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 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 [2021-07-09 17:41:04,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:05,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856835352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:05,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:05,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004502665] [2021-07-09 17:41:05,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:05,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:05,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:05,026 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) [2021-07-09 17:41:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:05,281 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-07-09 17:41:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:05,282 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 [2021-07-09 17:41:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:05,282 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:41:05,282 INFO L226 Difference]: Without dead ends: 350 [2021-07-09 17:41:05,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-09 17:41:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-07-09 17:41:05,285 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) [2021-07-09 17:41:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-07-09 17:41:05,286 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-07-09 17:41:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:05,286 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-07-09 17:41:05,286 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) [2021-07-09 17:41:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-07-09 17:41:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:05,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:05,286 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:05,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-07-09 17:41:05,487 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 413 times [2021-07-09 17:41:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:05,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369036317] [2021-07-09 17:41:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:05,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369036317] [2021-07-09 17:41:05,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369036317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497827691] [2021-07-09 17:41:05,546 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 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 [2021-07-09 17:41:05,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497827691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:05,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:05,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141138740] [2021-07-09 17:41:05,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:05,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:05,745 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) [2021-07-09 17:41:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:05,985 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-07-09 17:41:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:05,985 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 [2021-07-09 17:41:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:05,986 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:41:05,986 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:41:05,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:41:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-07-09 17:41:05,989 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) [2021-07-09 17:41:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-09 17:41:05,989 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-09 17:41:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:05,989 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-09 17:41:05,989 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) [2021-07-09 17:41:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-09 17:41:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:05,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:05,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:06,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:06,190 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:06,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 414 times [2021-07-09 17:41:06,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:06,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172860017] [2021-07-09 17:41:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:06,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:06,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172860017] [2021-07-09 17:41:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172860017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907728109] [2021-07-09 17:41:06,245 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 [2021-07-09 17:41:06,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:06,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907728109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:06,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:06,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166293886] [2021-07-09 17:41:06,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:06,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:06,438 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) [2021-07-09 17:41:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:06,623 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-07-09 17:41:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:06,623 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 [2021-07-09 17:41:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:06,624 INFO L225 Difference]: With dead ends: 362 [2021-07-09 17:41:06,624 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 17:41:06,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 17:41:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-07-09 17:41:06,627 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) [2021-07-09 17:41:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-07-09 17:41:06,627 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-07-09 17:41:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:06,628 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-07-09 17:41:06,628 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) [2021-07-09 17:41:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-07-09 17:41:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:06,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:06,628 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:06,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:06,829 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:06,829 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 415 times [2021-07-09 17:41:06,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:06,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246431411] [2021-07-09 17:41:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:06,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:06,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246431411] [2021-07-09 17:41:06,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246431411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827399971] [2021-07-09 17:41:06,888 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 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 [2021-07-09 17:41:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:07,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827399971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:07,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:07,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:07,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799214892] [2021-07-09 17:41:07,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:07,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:07,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:07,077 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) [2021-07-09 17:41:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:07,265 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-07-09 17:41:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:07,265 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 [2021-07-09 17:41:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:07,265 INFO L225 Difference]: With dead ends: 362 [2021-07-09 17:41:07,265 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:41:07,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:41:07,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-07-09 17:41:07,269 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) [2021-07-09 17:41:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-07-09 17:41:07,269 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-07-09 17:41:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:07,269 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-07-09 17:41:07,269 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) [2021-07-09 17:41:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-07-09 17:41:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:07,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:07,270 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:07,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:07,470 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 416 times [2021-07-09 17:41:07,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:07,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134940632] [2021-07-09 17:41:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:07,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134940632] [2021-07-09 17:41:07,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134940632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763820804] [2021-07-09 17:41:07,536 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 [2021-07-09 17:41:07,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763820804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:07,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:07,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:07,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355172458] [2021-07-09 17:41:07,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:07,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:07,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:07,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:07,739 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) [2021-07-09 17:41:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:07,937 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-07-09 17:41:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:07,937 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 [2021-07-09 17:41:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:07,938 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:41:07,938 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:41:07,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:41:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-07-09 17:41:07,941 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) [2021-07-09 17:41:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-07-09 17:41:07,941 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-07-09 17:41:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:07,941 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-07-09 17:41:07,941 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) [2021-07-09 17:41:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-07-09 17:41:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:07,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:07,942 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:08,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-07-09 17:41:08,142 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 417 times [2021-07-09 17:41:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:08,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257515719] [2021-07-09 17:41:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:08,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:08,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257515719] [2021-07-09 17:41:08,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257515719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:08,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198909583] [2021-07-09 17:41:08,210 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 [2021-07-09 17:41:08,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:08,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198909583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:08,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:08,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354400885] [2021-07-09 17:41:08,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:08,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:08,421 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) [2021-07-09 17:41:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:08,633 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-07-09 17:41:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:08,633 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 [2021-07-09 17:41:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:08,634 INFO L225 Difference]: With dead ends: 514 [2021-07-09 17:41:08,634 INFO L226 Difference]: Without dead ends: 514 [2021-07-09 17:41:08,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-09 17:41:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2021-07-09 17:41:08,637 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) [2021-07-09 17:41:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-07-09 17:41:08,638 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-07-09 17:41:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:08,638 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-07-09 17:41:08,638 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) [2021-07-09 17:41:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-07-09 17:41:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:08,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:08,639 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:08,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:08,839 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 418 times [2021-07-09 17:41:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:08,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929161101] [2021-07-09 17:41:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:08,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:08,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929161101] [2021-07-09 17:41:08,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929161101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:08,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636117021] [2021-07-09 17:41:08,910 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 [2021-07-09 17:41:09,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636117021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:09,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:09,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630008298] [2021-07-09 17:41:09,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:09,122 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) [2021-07-09 17:41:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:09,317 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-07-09 17:41:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:09,317 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 [2021-07-09 17:41:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:09,318 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:41:09,318 INFO L226 Difference]: Without dead ends: 514 [2021-07-09 17:41:09,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-09 17:41:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-07-09 17:41:09,322 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) [2021-07-09 17:41:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-07-09 17:41:09,322 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-07-09 17:41:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:09,323 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-07-09 17:41:09,323 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) [2021-07-09 17:41:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-07-09 17:41:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:09,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:09,323 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:09,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-07-09 17:41:09,523 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 419 times [2021-07-09 17:41:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:09,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671074701] [2021-07-09 17:41:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:09,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:09,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671074701] [2021-07-09 17:41:09,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671074701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:09,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595952750] [2021-07-09 17:41:09,593 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 [2021-07-09 17:41:09,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:09,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595952750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:09,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:09,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:09,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706963024] [2021-07-09 17:41:09,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:09,832 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) [2021-07-09 17:41:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:10,199 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-07-09 17:41:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:10,199 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 [2021-07-09 17:41:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:10,200 INFO L225 Difference]: With dead ends: 572 [2021-07-09 17:41:10,200 INFO L226 Difference]: Without dead ends: 572 [2021-07-09 17:41:10,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-09 17:41:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-07-09 17:41:10,204 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) [2021-07-09 17:41:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-07-09 17:41:10,204 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-07-09 17:41:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:10,205 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-07-09 17:41:10,205 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) [2021-07-09 17:41:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-07-09 17:41:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:10,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:10,205 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:10,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:10,405 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:10,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 420 times [2021-07-09 17:41:10,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:10,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427408138] [2021-07-09 17:41:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:10,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:10,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427408138] [2021-07-09 17:41:10,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427408138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:10,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321232274] [2021-07-09 17:41:10,474 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 [2021-07-09 17:41:10,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321232274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:10,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:10,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483694046] [2021-07-09 17:41:10,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:10,702 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) [2021-07-09 17:41:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:11,036 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-07-09 17:41:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:11,037 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 [2021-07-09 17:41:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:11,038 INFO L225 Difference]: With dead ends: 535 [2021-07-09 17:41:11,038 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 17:41:11,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 17:41:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-07-09 17:41:11,042 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) [2021-07-09 17:41:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-07-09 17:41:11,042 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-07-09 17:41:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:11,042 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-07-09 17:41:11,042 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) [2021-07-09 17:41:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-07-09 17:41:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:11,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:11,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:11,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-07-09 17:41:11,243 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:11,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 421 times [2021-07-09 17:41:11,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:11,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972673463] [2021-07-09 17:41:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:11,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972673463] [2021-07-09 17:41:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972673463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732343248] [2021-07-09 17:41:11,308 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 [2021-07-09 17:41:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:11,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732343248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:11,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:11,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:11,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425242988] [2021-07-09 17:41:11,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:11,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:11,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:11,515 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) [2021-07-09 17:41:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:11,844 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-07-09 17:41:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:11,844 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 [2021-07-09 17:41:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:11,845 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:41:11,845 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:41:11,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:41:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-07-09 17:41:11,849 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) [2021-07-09 17:41:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-07-09 17:41:11,849 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-07-09 17:41:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:11,850 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-07-09 17:41:11,850 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) [2021-07-09 17:41:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-07-09 17:41:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:11,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:11,850 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:12,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,050 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 422 times [2021-07-09 17:41:12,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:12,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718230461] [2021-07-09 17:41:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:12,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:12,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718230461] [2021-07-09 17:41:12,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718230461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:12,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086009208] [2021-07-09 17:41:12,129 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 [2021-07-09 17:41:12,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:12,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086009208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:12,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:12,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:12,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964438685] [2021-07-09 17:41:12,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:12,366 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) [2021-07-09 17:41:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:12,741 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2021-07-09 17:41:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:12,741 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 [2021-07-09 17:41:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:12,742 INFO L225 Difference]: With dead ends: 543 [2021-07-09 17:41:12,742 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:41:12,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:41:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2021-07-09 17:41:12,745 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) [2021-07-09 17:41:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-07-09 17:41:12,746 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-07-09 17:41:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:12,746 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-07-09 17:41:12,746 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) [2021-07-09 17:41:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-07-09 17:41:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:12,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:12,747 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:12,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,947 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 423 times [2021-07-09 17:41:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:12,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565841366] [2021-07-09 17:41:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:13,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565841366] [2021-07-09 17:41:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565841366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349980562] [2021-07-09 17:41:13,017 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 [2021-07-09 17:41:13,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:13,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349980562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:13,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:13,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558113289] [2021-07-09 17:41:13,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:13,227 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) [2021-07-09 17:41:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:13,388 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-07-09 17:41:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:13,388 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 [2021-07-09 17:41:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:13,389 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:41:13,389 INFO L226 Difference]: Without dead ends: 517 [2021-07-09 17:41:13,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-09 17:41:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-07-09 17:41:13,393 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) [2021-07-09 17:41:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-07-09 17:41:13,393 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-07-09 17:41:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:13,393 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-07-09 17:41:13,393 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) [2021-07-09 17:41:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-07-09 17:41:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:13,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:13,394 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:13,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:13,594 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 424 times [2021-07-09 17:41:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:13,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914910588] [2021-07-09 17:41:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:13,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914910588] [2021-07-09 17:41:13,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914910588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203428606] [2021-07-09 17:41:13,664 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 [2021-07-09 17:41:13,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:13,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:13,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203428606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:13,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263551452] [2021-07-09 17:41:13,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:13,877 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) [2021-07-09 17:41:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:14,103 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-07-09 17:41:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:14,103 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 [2021-07-09 17:41:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:14,104 INFO L225 Difference]: With dead ends: 505 [2021-07-09 17:41:14,104 INFO L226 Difference]: Without dead ends: 505 [2021-07-09 17:41:14,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-09 17:41:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-07-09 17:41:14,108 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) [2021-07-09 17:41:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-07-09 17:41:14,108 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-07-09 17:41:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:14,108 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-07-09 17:41:14,108 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) [2021-07-09 17:41:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-07-09 17:41:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:14,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:14,109 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:14,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:14,309 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 425 times [2021-07-09 17:41:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:14,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918834242] [2021-07-09 17:41:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:14,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:14,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918834242] [2021-07-09 17:41:14,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918834242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:14,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894695632] [2021-07-09 17:41:14,376 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 [2021-07-09 17:41:14,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:14,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894695632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:14,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:14,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110437629] [2021-07-09 17:41:14,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:14,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:14,606 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) [2021-07-09 17:41:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:14,787 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-07-09 17:41:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:14,787 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 [2021-07-09 17:41:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:14,788 INFO L225 Difference]: With dead ends: 460 [2021-07-09 17:41:14,788 INFO L226 Difference]: Without dead ends: 460 [2021-07-09 17:41:14,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-07-09 17:41:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-07-09 17:41:14,791 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) [2021-07-09 17:41:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-07-09 17:41:14,792 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-07-09 17:41:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:14,792 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-07-09 17:41:14,792 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) [2021-07-09 17:41:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-07-09 17:41:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:14,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:14,793 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:14,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3859,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:14,994 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 426 times [2021-07-09 17:41:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:14,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692853385] [2021-07-09 17:41:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:15,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692853385] [2021-07-09 17:41:15,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692853385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153863010] [2021-07-09 17:41:15,058 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 [2021-07-09 17:41:15,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:15,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153863010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:15,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:15,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:15,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703936814] [2021-07-09 17:41:15,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:15,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:15,266 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) [2021-07-09 17:41:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:15,469 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-07-09 17:41:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:15,470 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 [2021-07-09 17:41:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:15,470 INFO L225 Difference]: With dead ends: 499 [2021-07-09 17:41:15,470 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:41:15,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:41:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-07-09 17:41:15,474 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) [2021-07-09 17:41:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-07-09 17:41:15,475 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-07-09 17:41:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:15,475 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-07-09 17:41:15,475 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) [2021-07-09 17:41:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-07-09 17:41:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:15,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:15,475 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:15,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:15,676 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 427 times [2021-07-09 17:41:15,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:15,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084634292] [2021-07-09 17:41:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:15,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084634292] [2021-07-09 17:41:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084634292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329175470] [2021-07-09 17:41:15,740 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 [2021-07-09 17:41:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:15,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329175470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:15,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:15,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:15,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211022049] [2021-07-09 17:41:15,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:15,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:15,953 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) [2021-07-09 17:41:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:16,214 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-07-09 17:41:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:16,214 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 [2021-07-09 17:41:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:16,215 INFO L225 Difference]: With dead ends: 505 [2021-07-09 17:41:16,215 INFO L226 Difference]: Without dead ends: 505 [2021-07-09 17:41:16,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-09 17:41:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-07-09 17:41:16,218 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) [2021-07-09 17:41:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-09 17:41:16,219 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-09 17:41:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:16,219 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-09 17:41:16,219 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) [2021-07-09 17:41:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-09 17:41:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:16,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:16,219 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:16,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:16,420 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 428 times [2021-07-09 17:41:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:16,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511946073] [2021-07-09 17:41:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:16,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:16,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511946073] [2021-07-09 17:41:16,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511946073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:16,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348289693] [2021-07-09 17:41:16,483 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 [2021-07-09 17:41:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348289693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:16,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:16,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:16,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41045162] [2021-07-09 17:41:16,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:16,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:16,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:16,695 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) [2021-07-09 17:41:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:16,872 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-07-09 17:41:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:16,873 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 [2021-07-09 17:41:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:16,873 INFO L225 Difference]: With dead ends: 480 [2021-07-09 17:41:16,874 INFO L226 Difference]: Without dead ends: 480 [2021-07-09 17:41:16,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-09 17:41:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-07-09 17:41:16,877 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) [2021-07-09 17:41:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-07-09 17:41:16,878 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-07-09 17:41:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:16,878 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-07-09 17:41:16,878 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) [2021-07-09 17:41:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-07-09 17:41:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:16,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:16,878 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:17,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,079 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 429 times [2021-07-09 17:41:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:17,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167991500] [2021-07-09 17:41:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167991500] [2021-07-09 17:41:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167991500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242253906] [2021-07-09 17:41:17,200 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 [2021-07-09 17:41:17,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:17,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242253906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:17,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:17,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794400735] [2021-07-09 17:41:17,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:17,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:17,407 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) [2021-07-09 17:41:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:17,610 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-07-09 17:41:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:17,610 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 [2021-07-09 17:41:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:17,611 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:41:17,611 INFO L226 Difference]: Without dead ends: 504 [2021-07-09 17:41:17,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-09 17:41:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-07-09 17:41:17,615 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) [2021-07-09 17:41:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-07-09 17:41:17,615 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-07-09 17:41:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:17,615 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-07-09 17:41:17,615 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) [2021-07-09 17:41:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-07-09 17:41:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:17,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:17,616 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:17,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,816 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 430 times [2021-07-09 17:41:17,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:17,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776167910] [2021-07-09 17:41:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:17,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776167910] [2021-07-09 17:41:17,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776167910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506856813] [2021-07-09 17:41:17,888 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 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 [2021-07-09 17:41:17,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:18,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506856813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379511485] [2021-07-09 17:41:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:18,100 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) [2021-07-09 17:41:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:18,337 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-07-09 17:41:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:18,338 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 [2021-07-09 17:41:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:18,338 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:41:18,338 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:41:18,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:41:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-07-09 17:41:18,342 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) [2021-07-09 17:41:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-07-09 17:41:18,343 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-07-09 17:41:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:18,343 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-07-09 17:41:18,343 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) [2021-07-09 17:41:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-07-09 17:41:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:18,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:18,343 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:18,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:18,544 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 431 times [2021-07-09 17:41:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:18,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482135288] [2021-07-09 17:41:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:18,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482135288] [2021-07-09 17:41:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482135288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991685173] [2021-07-09 17:41:18,606 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 [2021-07-09 17:41:18,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:18,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991685173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:18,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:18,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846803111] [2021-07-09 17:41:18,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:18,824 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) [2021-07-09 17:41:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:19,028 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-07-09 17:41:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:19,028 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 [2021-07-09 17:41:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:19,029 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:41:19,029 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:41:19,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:41:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-07-09 17:41:19,032 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) [2021-07-09 17:41:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-07-09 17:41:19,033 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-07-09 17:41:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:19,033 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-07-09 17:41:19,033 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) [2021-07-09 17:41:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-07-09 17:41:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:19,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:19,033 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:19,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:19,234 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 432 times [2021-07-09 17:41:19,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:19,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045478956] [2021-07-09 17:41:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045478956] [2021-07-09 17:41:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045478956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200326119] [2021-07-09 17:41:19,309 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 [2021-07-09 17:41:19,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200326119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:19,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:19,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93432590] [2021-07-09 17:41:19,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:19,554 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) [2021-07-09 17:41:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:19,728 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-07-09 17:41:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:19,728 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 [2021-07-09 17:41:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:19,729 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:41:19,729 INFO L226 Difference]: Without dead ends: 474 [2021-07-09 17:41:19,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-09 17:41:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-07-09 17:41:19,733 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) [2021-07-09 17:41:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-07-09 17:41:19,733 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-07-09 17:41:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:19,733 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-07-09 17:41:19,733 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) [2021-07-09 17:41:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-07-09 17:41:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:19,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:19,734 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:19,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:19,934 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 433 times [2021-07-09 17:41:19,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:19,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158662203] [2021-07-09 17:41:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158662203] [2021-07-09 17:41:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158662203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752401604] [2021-07-09 17:41:19,992 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 [2021-07-09 17:41:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752401604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:20,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:20,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:20,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896332533] [2021-07-09 17:41:20,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:20,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:20,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:20,182 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) [2021-07-09 17:41:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:20,393 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-07-09 17:41:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:20,394 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 [2021-07-09 17:41:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:20,394 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:41:20,394 INFO L226 Difference]: Without dead ends: 533 [2021-07-09 17:41:20,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-09 17:41:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-07-09 17:41:20,398 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) [2021-07-09 17:41:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-07-09 17:41:20,399 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-07-09 17:41:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:20,399 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-07-09 17:41:20,399 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) [2021-07-09 17:41:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-07-09 17:41:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:20,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:20,399 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:20,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:20,600 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 434 times [2021-07-09 17:41:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:20,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704850934] [2021-07-09 17:41:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:20,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704850934] [2021-07-09 17:41:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704850934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075883181] [2021-07-09 17:41:20,664 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 [2021-07-09 17:41:20,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:20,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075883181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:20,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:20,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:20,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404758789] [2021-07-09 17:41:20,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:20,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:20,873 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) [2021-07-09 17:41:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:21,172 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-07-09 17:41:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:21,173 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 [2021-07-09 17:41:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:21,174 INFO L225 Difference]: With dead ends: 545 [2021-07-09 17:41:21,174 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 17:41:21,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 17:41:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-07-09 17:41:21,177 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) [2021-07-09 17:41:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-07-09 17:41:21,178 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-07-09 17:41:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:21,178 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-07-09 17:41:21,178 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) [2021-07-09 17:41:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-07-09 17:41:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:21,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:21,178 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:21,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3925,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:21,379 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 435 times [2021-07-09 17:41:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:21,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050183975] [2021-07-09 17:41:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:21,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:21,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050183975] [2021-07-09 17:41:21,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050183975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:21,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326196501] [2021-07-09 17:41:21,446 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 [2021-07-09 17:41:21,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:21,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326196501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:21,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:21,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:41:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605823754] [2021-07-09 17:41:21,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:41:21,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:41:21,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:41:21,660 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) [2021-07-09 17:41:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:21,899 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-07-09 17:41:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:21,899 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 [2021-07-09 17:41:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:21,900 INFO L225 Difference]: With dead ends: 528 [2021-07-09 17:41:21,900 INFO L226 Difference]: Without dead ends: 528 [2021-07-09 17:41:21,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-09 17:41:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-07-09 17:41:21,904 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) [2021-07-09 17:41:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-07-09 17:41:21,904 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-07-09 17:41:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:21,904 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-07-09 17:41:21,904 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) [2021-07-09 17:41:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-07-09 17:41:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:21,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:21,905 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:22,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-07-09 17:41:22,105 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 436 times [2021-07-09 17:41:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:22,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56082651] [2021-07-09 17:41:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:22,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56082651] [2021-07-09 17:41:22,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56082651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528974026] [2021-07-09 17:41:22,161 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 [2021-07-09 17:41:22,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528974026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:22,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101179924] [2021-07-09 17:41:22,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:22,353 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) [2021-07-09 17:41:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:22,547 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-07-09 17:41:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:22,547 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 [2021-07-09 17:41:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:22,548 INFO L225 Difference]: With dead ends: 553 [2021-07-09 17:41:22,548 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:41:22,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:41:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-07-09 17:41:22,552 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) [2021-07-09 17:41:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-07-09 17:41:22,552 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-07-09 17:41:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:22,552 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-07-09 17:41:22,552 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) [2021-07-09 17:41:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-07-09 17:41:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:22,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:22,553 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:22,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:22,753 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 437 times [2021-07-09 17:41:22,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:22,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542572482] [2021-07-09 17:41:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542572482] [2021-07-09 17:41:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542572482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172403692] [2021-07-09 17:41:22,800 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 [2021-07-09 17:41:22,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:22,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172403692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:22,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082540682] [2021-07-09 17:41:22,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:22,992 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) [2021-07-09 17:41:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:23,220 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-07-09 17:41:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:23,221 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 [2021-07-09 17:41:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:23,221 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:41:23,221 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:41:23,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:41:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-07-09 17:41:23,224 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) [2021-07-09 17:41:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-07-09 17:41:23,225 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-07-09 17:41:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:23,225 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-07-09 17:41:23,225 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) [2021-07-09 17:41:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-07-09 17:41:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:23,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:23,225 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:23,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:23,426 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 438 times [2021-07-09 17:41:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:23,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126847018] [2021-07-09 17:41:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:23,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126847018] [2021-07-09 17:41:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126847018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382004070] [2021-07-09 17:41:23,475 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 [2021-07-09 17:41:23,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382004070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:23,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:23,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:23,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616947916] [2021-07-09 17:41:23,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:23,661 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) [2021-07-09 17:41:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:23,903 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-07-09 17:41:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:23,904 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 [2021-07-09 17:41:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:23,904 INFO L225 Difference]: With dead ends: 353 [2021-07-09 17:41:23,904 INFO L226 Difference]: Without dead ends: 347 [2021-07-09 17:41:23,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-09 17:41:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-07-09 17:41:23,907 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) [2021-07-09 17:41:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-07-09 17:41:23,908 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-07-09 17:41:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:23,908 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-07-09 17:41:23,908 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) [2021-07-09 17:41:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-07-09 17:41:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:23,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:23,908 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:24,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-07-09 17:41:24,109 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 439 times [2021-07-09 17:41:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:24,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569458014] [2021-07-09 17:41:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569458014] [2021-07-09 17:41:24,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569458014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304364263] [2021-07-09 17:41:24,166 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 [2021-07-09 17:41:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304364263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:24,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456672423] [2021-07-09 17:41:24,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:24,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:24,350 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) [2021-07-09 17:41:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:24,526 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-07-09 17:41:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:24,527 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 [2021-07-09 17:41:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:24,527 INFO L225 Difference]: With dead ends: 324 [2021-07-09 17:41:24,527 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:41:24,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:41:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-07-09 17:41:24,530 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) [2021-07-09 17:41:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-07-09 17:41:24,531 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-07-09 17:41:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:24,531 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-07-09 17:41:24,531 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) [2021-07-09 17:41:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-07-09 17:41:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:24,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:24,531 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:24,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:24,732 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 440 times [2021-07-09 17:41:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:24,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452404344] [2021-07-09 17:41:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:24,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452404344] [2021-07-09 17:41:24,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452404344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784000116] [2021-07-09 17:41:24,781 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 [2021-07-09 17:41:24,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784000116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:24,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:24,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615777223] [2021-07-09 17:41:24,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:24,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:24,953 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) [2021-07-09 17:41:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:25,097 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-07-09 17:41:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:25,097 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 [2021-07-09 17:41:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:25,098 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:41:25,098 INFO L226 Difference]: Without dead ends: 353 [2021-07-09 17:41:25,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-09 17:41:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-07-09 17:41:25,101 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) [2021-07-09 17:41:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-07-09 17:41:25,102 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-07-09 17:41:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:25,102 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-07-09 17:41:25,102 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) [2021-07-09 17:41:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-07-09 17:41:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:25,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:25,102 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:25,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-09 17:41:25,303 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:25,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 441 times [2021-07-09 17:41:25,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:25,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633602422] [2021-07-09 17:41:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633602422] [2021-07-09 17:41:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633602422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277002413] [2021-07-09 17:41:25,359 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 [2021-07-09 17:41:25,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:25,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:25,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277002413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:25,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:25,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146313368] [2021-07-09 17:41:25,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:25,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:25,531 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) [2021-07-09 17:41:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:25,698 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-07-09 17:41:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:25,698 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 [2021-07-09 17:41:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:25,699 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:41:25,699 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:41:25,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:41:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-07-09 17:41:25,702 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) [2021-07-09 17:41:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-07-09 17:41:25,702 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-07-09 17:41:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:25,703 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-07-09 17:41:25,703 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) [2021-07-09 17:41:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-07-09 17:41:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:25,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:25,703 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:25,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:25,903 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 442 times [2021-07-09 17:41:25,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:25,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773390563] [2021-07-09 17:41:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773390563] [2021-07-09 17:41:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773390563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062000822] [2021-07-09 17:41:25,954 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 [2021-07-09 17:41:26,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:26,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062000822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:26,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:26,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211476330] [2021-07-09 17:41:26,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:26,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:26,123 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) [2021-07-09 17:41:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:26,259 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-07-09 17:41:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:26,260 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 [2021-07-09 17:41:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:26,260 INFO L225 Difference]: With dead ends: 334 [2021-07-09 17:41:26,260 INFO L226 Difference]: Without dead ends: 334 [2021-07-09 17:41:26,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-09 17:41:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-07-09 17:41:26,263 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) [2021-07-09 17:41:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-07-09 17:41:26,263 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-07-09 17:41:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:26,264 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-07-09 17:41:26,264 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) [2021-07-09 17:41:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-07-09 17:41:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:26,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:26,264 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:26,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,445 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:26,464 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 443 times [2021-07-09 17:41:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:26,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473654799] [2021-07-09 17:41:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:26,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473654799] [2021-07-09 17:41:26,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473654799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228865671] [2021-07-09 17:41:26,515 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 [2021-07-09 17:41:26,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:26,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:26,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228865671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:26,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953462031] [2021-07-09 17:41:26,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:26,693 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) [2021-07-09 17:41:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:26,845 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-07-09 17:41:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:26,845 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 [2021-07-09 17:41:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:26,846 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:41:26,846 INFO L226 Difference]: Without dead ends: 412 [2021-07-09 17:41:26,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-09 17:41:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-07-09 17:41:26,849 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) [2021-07-09 17:41:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-07-09 17:41:26,850 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-07-09 17:41:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:26,850 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-07-09 17:41:26,850 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) [2021-07-09 17:41:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-07-09 17:41:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:26,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:26,850 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:27,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:27,050 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 444 times [2021-07-09 17:41:27,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:27,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465893509] [2021-07-09 17:41:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:27,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:27,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465893509] [2021-07-09 17:41:27,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465893509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085458451] [2021-07-09 17:41:27,104 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 [2021-07-09 17:41:27,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:27,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085458451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:27,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815252994] [2021-07-09 17:41:27,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:27,276 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) [2021-07-09 17:41:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:27,438 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-07-09 17:41:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:27,438 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 [2021-07-09 17:41:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:27,439 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:41:27,439 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:41:27,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:41:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-07-09 17:41:27,443 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) [2021-07-09 17:41:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-07-09 17:41:27,443 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-07-09 17:41:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:27,443 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-07-09 17:41:27,443 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) [2021-07-09 17:41:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-07-09 17:41:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:27,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:27,444 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:27,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-09 17:41:27,644 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 445 times [2021-07-09 17:41:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:27,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342319534] [2021-07-09 17:41:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:27,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342319534] [2021-07-09 17:41:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342319534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418043074] [2021-07-09 17:41:27,708 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 [2021-07-09 17:41:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418043074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:27,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:41:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387129073] [2021-07-09 17:41:27,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:41:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:41:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:41:27,880 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) [2021-07-09 17:41:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:28,046 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-07-09 17:41:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:28,047 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 [2021-07-09 17:41:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:28,047 INFO L225 Difference]: With dead ends: 407 [2021-07-09 17:41:28,047 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:41:28,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:41:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-07-09 17:41:28,051 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) [2021-07-09 17:41:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-07-09 17:41:28,051 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-07-09 17:41:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:28,051 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-07-09 17:41:28,051 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) [2021-07-09 17:41:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-07-09 17:41:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:28,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:28,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:28,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:28,252 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 446 times [2021-07-09 17:41:28,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:28,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524777556] [2021-07-09 17:41:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:28,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524777556] [2021-07-09 17:41:28,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524777556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407801003] [2021-07-09 17:41:28,302 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 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 [2021-07-09 17:41:28,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:28,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407801003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:28,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:28,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:41:28,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489099925] [2021-07-09 17:41:28,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:41:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:41:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:41:28,457 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) [2021-07-09 17:41:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:28,614 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-07-09 17:41:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:28,614 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 [2021-07-09 17:41:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:28,615 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:41:28,615 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:41:28,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:41:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-07-09 17:41:28,618 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) [2021-07-09 17:41:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-07-09 17:41:28,619 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-07-09 17:41:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:28,619 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-07-09 17:41:28,619 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) [2021-07-09 17:41:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-07-09 17:41:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:28,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:28,619 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:28,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:28,821 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 447 times [2021-07-09 17:41:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:28,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169977986] [2021-07-09 17:41:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:28,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169977986] [2021-07-09 17:41:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169977986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567768487] [2021-07-09 17:41:28,886 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 [2021-07-09 17:41:28,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:29,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567768487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:29,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:29,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:29,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469577482] [2021-07-09 17:41:29,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:29,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:29,164 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) [2021-07-09 17:41:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:29,684 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-07-09 17:41:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:29,684 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 [2021-07-09 17:41:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:29,685 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:41:29,685 INFO L226 Difference]: Without dead ends: 592 [2021-07-09 17:41:29,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-09 17:41:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-07-09 17:41:29,689 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) [2021-07-09 17:41:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-07-09 17:41:29,689 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-07-09 17:41:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:29,690 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-07-09 17:41:29,690 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) [2021-07-09 17:41:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-07-09 17:41:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:29,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:29,690 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:29,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4000,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:29,890 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 448 times [2021-07-09 17:41:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:29,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628358788] [2021-07-09 17:41:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:29,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:29,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628358788] [2021-07-09 17:41:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628358788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:29,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281373241] [2021-07-09 17:41:29,954 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 [2021-07-09 17:41:30,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:30,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:30,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281373241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:30,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:30,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829009072] [2021-07-09 17:41:30,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:30,212 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) [2021-07-09 17:41:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:30,704 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-07-09 17:41:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:30,704 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 [2021-07-09 17:41:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:30,705 INFO L225 Difference]: With dead ends: 598 [2021-07-09 17:41:30,705 INFO L226 Difference]: Without dead ends: 592 [2021-07-09 17:41:30,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-09 17:41:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-07-09 17:41:30,709 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) [2021-07-09 17:41:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-07-09 17:41:30,710 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-07-09 17:41:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:30,710 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-07-09 17:41:30,710 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) [2021-07-09 17:41:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-07-09 17:41:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:30,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:30,710 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:30,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-07-09 17:41:30,911 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 449 times [2021-07-09 17:41:30,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:30,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003040230] [2021-07-09 17:41:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:30,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:30,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003040230] [2021-07-09 17:41:30,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003040230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:30,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847658225] [2021-07-09 17:41:30,972 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 [2021-07-09 17:41:31,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847658225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:31,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152635240] [2021-07-09 17:41:31,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:31,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:31,242 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) [2021-07-09 17:41:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:31,637 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-07-09 17:41:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:31,637 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 [2021-07-09 17:41:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:31,638 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:41:31,638 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:41:31,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:41:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-07-09 17:41:31,642 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) [2021-07-09 17:41:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-07-09 17:41:31,642 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-07-09 17:41:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:31,642 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-07-09 17:41:31,642 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) [2021-07-09 17:41:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-07-09 17:41:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:31,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:31,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:31,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-09 17:41:31,843 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 450 times [2021-07-09 17:41:31,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:31,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703487718] [2021-07-09 17:41:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:31,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703487718] [2021-07-09 17:41:31,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703487718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523366079] [2021-07-09 17:41:31,901 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 [2021-07-09 17:41:31,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:32,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523366079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:32,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:32,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:32,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660502038] [2021-07-09 17:41:32,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:32,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:32,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:32,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:32,132 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) [2021-07-09 17:41:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:32,466 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-07-09 17:41:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:32,466 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 [2021-07-09 17:41:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:32,467 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:41:32,467 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:41:32,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:41:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-07-09 17:41:32,471 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) [2021-07-09 17:41:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-07-09 17:41:32,471 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-07-09 17:41:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:32,472 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-07-09 17:41:32,472 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) [2021-07-09 17:41:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-07-09 17:41:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:32,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:32,472 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:32,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-07-09 17:41:32,672 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 451 times [2021-07-09 17:41:32,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:32,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969797082] [2021-07-09 17:41:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:32,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969797082] [2021-07-09 17:41:32,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969797082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933987731] [2021-07-09 17:41:32,741 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 [2021-07-09 17:41:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933987731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:33,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:33,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441681608] [2021-07-09 17:41:33,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:33,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:33,030 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) [2021-07-09 17:41:33,315 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-07-09 17:41:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:33,460 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-07-09 17:41:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:33,461 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 [2021-07-09 17:41:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:33,461 INFO L225 Difference]: With dead ends: 604 [2021-07-09 17:41:33,462 INFO L226 Difference]: Without dead ends: 604 [2021-07-09 17:41:33,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-09 17:41:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-07-09 17:41:33,465 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) [2021-07-09 17:41:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-07-09 17:41:33,466 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-07-09 17:41:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:33,466 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-07-09 17:41:33,466 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) [2021-07-09 17:41:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-07-09 17:41:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:33,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:33,467 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:33,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:33,667 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 452 times [2021-07-09 17:41:33,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:33,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112486374] [2021-07-09 17:41:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112486374] [2021-07-09 17:41:33,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112486374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272846386] [2021-07-09 17:41:33,734 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 [2021-07-09 17:41:33,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272846386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:33,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:33,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260603929] [2021-07-09 17:41:33,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:34,000 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) [2021-07-09 17:41:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:34,443 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-07-09 17:41:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:34,443 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 [2021-07-09 17:41:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:34,444 INFO L225 Difference]: With dead ends: 610 [2021-07-09 17:41:34,444 INFO L226 Difference]: Without dead ends: 604 [2021-07-09 17:41:34,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-09 17:41:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-07-09 17:41:34,448 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) [2021-07-09 17:41:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-07-09 17:41:34,448 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-07-09 17:41:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:34,448 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-07-09 17:41:34,448 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) [2021-07-09 17:41:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-07-09 17:41:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:34,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:34,449 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:34,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:34,649 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 453 times [2021-07-09 17:41:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:34,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288445565] [2021-07-09 17:41:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:34,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:34,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288445565] [2021-07-09 17:41:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288445565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:34,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992964689] [2021-07-09 17:41:34,715 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 [2021-07-09 17:41:34,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:34,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:34,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:34,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:34,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992964689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:34,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:34,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:34,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054840573] [2021-07-09 17:41:34,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:34,982 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) [2021-07-09 17:41:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:35,344 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-07-09 17:41:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:35,344 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 [2021-07-09 17:41:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:35,345 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:41:35,345 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:41:35,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:41:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-07-09 17:41:35,348 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) [2021-07-09 17:41:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-07-09 17:41:35,349 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-07-09 17:41:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:35,349 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-07-09 17:41:35,349 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) [2021-07-09 17:41:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-07-09 17:41:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:35,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:35,349 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:35,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-09 17:41:35,550 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 454 times [2021-07-09 17:41:35,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:35,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270991239] [2021-07-09 17:41:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:35,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270991239] [2021-07-09 17:41:35,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270991239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774642553] [2021-07-09 17:41:35,627 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 [2021-07-09 17:41:35,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:35,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:35,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774642553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:35,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:35,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:35,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359495123] [2021-07-09 17:41:35,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:35,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:35,897 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) [2021-07-09 17:41:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:36,482 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-07-09 17:41:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:36,482 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 [2021-07-09 17:41:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:36,483 INFO L225 Difference]: With dead ends: 682 [2021-07-09 17:41:36,483 INFO L226 Difference]: Without dead ends: 682 [2021-07-09 17:41:36,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-09 17:41:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-07-09 17:41:36,487 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) [2021-07-09 17:41:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-07-09 17:41:36,488 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-07-09 17:41:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:36,488 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-07-09 17:41:36,488 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) [2021-07-09 17:41:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-07-09 17:41:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:36,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:36,488 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:36,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-09 17:41:36,689 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 455 times [2021-07-09 17:41:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:36,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706489270] [2021-07-09 17:41:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:36,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706489270] [2021-07-09 17:41:36,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706489270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535640483] [2021-07-09 17:41:36,760 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 [2021-07-09 17:41:36,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535640483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941633296] [2021-07-09 17:41:37,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:37,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:37,030 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) [2021-07-09 17:41:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:37,722 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-07-09 17:41:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:41:37,722 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 [2021-07-09 17:41:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:37,723 INFO L225 Difference]: With dead ends: 688 [2021-07-09 17:41:37,723 INFO L226 Difference]: Without dead ends: 682 [2021-07-09 17:41:37,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-09 17:41:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-07-09 17:41:37,727 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) [2021-07-09 17:41:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-07-09 17:41:37,728 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-07-09 17:41:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:37,728 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-07-09 17:41:37,728 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) [2021-07-09 17:41:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-07-09 17:41:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:37,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:37,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:37,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-07-09 17:41:37,929 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 456 times [2021-07-09 17:41:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123858517] [2021-07-09 17:41:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:38,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:38,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123858517] [2021-07-09 17:41:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123858517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:38,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152150958] [2021-07-09 17:41:38,002 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 [2021-07-09 17:41:38,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152150958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:38,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:38,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:38,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900882568] [2021-07-09 17:41:38,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:38,288 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) [2021-07-09 17:41:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:38,661 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-07-09 17:41:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:38,661 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 [2021-07-09 17:41:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:38,662 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:41:38,662 INFO L226 Difference]: Without dead ends: 650 [2021-07-09 17:41:38,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-09 17:41:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-07-09 17:41:38,668 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) [2021-07-09 17:41:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-07-09 17:41:38,669 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-07-09 17:41:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:38,669 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-07-09 17:41:38,669 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) [2021-07-09 17:41:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-07-09 17:41:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:38,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:38,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:38,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:38,885 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 457 times [2021-07-09 17:41:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:38,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700761465] [2021-07-09 17:41:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:38,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700761465] [2021-07-09 17:41:38,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700761465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43192973] [2021-07-09 17:41:38,957 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 [2021-07-09 17:41:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:39,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:39,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43192973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:39,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:39,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:39,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429565077] [2021-07-09 17:41:39,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:39,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:39,225 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) [2021-07-09 17:41:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:39,571 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-07-09 17:41:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:39,571 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 [2021-07-09 17:41:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:39,572 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:41:39,572 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 17:41:39,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 17:41:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-07-09 17:41:39,576 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) [2021-07-09 17:41:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-07-09 17:41:39,577 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-07-09 17:41:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:39,577 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-07-09 17:41:39,577 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) [2021-07-09 17:41:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-07-09 17:41:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:39,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:39,577 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:39,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:39,778 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 458 times [2021-07-09 17:41:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:39,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540268591] [2021-07-09 17:41:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:39,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:39,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540268591] [2021-07-09 17:41:39,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540268591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:39,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302961626] [2021-07-09 17:41:39,847 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 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 [2021-07-09 17:41:39,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302961626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451189213] [2021-07-09 17:41:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:40,117 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) [2021-07-09 17:41:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:40,715 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-07-09 17:41:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:41:40,716 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 [2021-07-09 17:41:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:40,717 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:41:40,717 INFO L226 Difference]: Without dead ends: 644 [2021-07-09 17:41:40,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-09 17:41:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-07-09 17:41:40,721 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) [2021-07-09 17:41:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-07-09 17:41:40,721 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-07-09 17:41:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:40,721 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-07-09 17:41:40,721 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) [2021-07-09 17:41:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-07-09 17:41:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:40,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:40,722 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:40,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-07-09 17:41:40,922 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:40,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 459 times [2021-07-09 17:41:40,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:40,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214887273] [2021-07-09 17:41:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:41,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214887273] [2021-07-09 17:41:41,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214887273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:41,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777839540] [2021-07-09 17:41:41,002 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 [2021-07-09 17:41:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:41:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:41,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777839540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:41,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:41,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:41,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268495315] [2021-07-09 17:41:41,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:41,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:41,311 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) [2021-07-09 17:41:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:41,887 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-07-09 17:41:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:41,887 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 [2021-07-09 17:41:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:41,888 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:41:41,888 INFO L226 Difference]: Without dead ends: 627 [2021-07-09 17:41:41,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-09 17:41:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-07-09 17:41:41,892 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) [2021-07-09 17:41:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-07-09 17:41:41,892 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-07-09 17:41:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:41,892 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-07-09 17:41:41,892 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) [2021-07-09 17:41:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-07-09 17:41:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:41,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:41,893 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:42,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:42,093 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 460 times [2021-07-09 17:41:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:42,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24361227] [2021-07-09 17:41:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:42,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24361227] [2021-07-09 17:41:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24361227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886480483] [2021-07-09 17:41:42,165 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 [2021-07-09 17:41:42,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:42,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886480483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:42,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:42,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:42,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184979389] [2021-07-09 17:41:42,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:42,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:42,538 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) [2021-07-09 17:41:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:42,937 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-07-09 17:41:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:42,937 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 [2021-07-09 17:41:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:42,938 INFO L225 Difference]: With dead ends: 567 [2021-07-09 17:41:42,938 INFO L226 Difference]: Without dead ends: 555 [2021-07-09 17:41:42,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-09 17:41:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-07-09 17:41:42,941 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) [2021-07-09 17:41:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-07-09 17:41:42,942 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-07-09 17:41:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:42,942 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-07-09 17:41:42,942 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) [2021-07-09 17:41:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-07-09 17:41:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:42,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:42,942 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:43,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:43,143 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:43,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 461 times [2021-07-09 17:41:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:43,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351779446] [2021-07-09 17:41:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:43,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:43,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351779446] [2021-07-09 17:41:43,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351779446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:43,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419468373] [2021-07-09 17:41:43,209 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 [2021-07-09 17:41:43,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419468373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267077875] [2021-07-09 17:41:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:43,483 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) [2021-07-09 17:41:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:43,999 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-07-09 17:41:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:44,000 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 [2021-07-09 17:41:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:44,001 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:41:44,001 INFO L226 Difference]: Without dead ends: 586 [2021-07-09 17:41:44,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-09 17:41:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-07-09 17:41:44,009 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) [2021-07-09 17:41:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-09 17:41:44,010 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-09 17:41:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:44,010 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-09 17:41:44,010 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) [2021-07-09 17:41:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-09 17:41:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:44,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:44,010 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:44,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4127 [2021-07-09 17:41:44,211 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 462 times [2021-07-09 17:41:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:44,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578371445] [2021-07-09 17:41:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:44,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578371445] [2021-07-09 17:41:44,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578371445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550872448] [2021-07-09 17:41:44,277 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 [2021-07-09 17:41:44,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:44,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:44,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550872448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:44,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:44,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:44,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269220234] [2021-07-09 17:41:44,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:44,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:44,546 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) [2021-07-09 17:41:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:44,856 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-07-09 17:41:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:44,857 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 [2021-07-09 17:41:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:44,857 INFO L225 Difference]: With dead ends: 563 [2021-07-09 17:41:44,857 INFO L226 Difference]: Without dead ends: 563 [2021-07-09 17:41:44,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-09 17:41:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-07-09 17:41:44,861 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) [2021-07-09 17:41:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-07-09 17:41:44,862 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-07-09 17:41:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:44,862 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-07-09 17:41:44,862 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) [2021-07-09 17:41:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-07-09 17:41:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:44,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:44,862 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:45,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-07-09 17:41:45,063 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 463 times [2021-07-09 17:41:45,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:45,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362087361] [2021-07-09 17:41:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:45,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:45,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362087361] [2021-07-09 17:41:45,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362087361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:45,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306418094] [2021-07-09 17:41:45,120 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 [2021-07-09 17:41:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:45,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306418094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:45,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:45,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:41:45,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653891755] [2021-07-09 17:41:45,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:41:45,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:41:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:41:45,365 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) [2021-07-09 17:41:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:45,729 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-07-09 17:41:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:45,729 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 [2021-07-09 17:41:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:45,730 INFO L225 Difference]: With dead ends: 651 [2021-07-09 17:41:45,730 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:41:45,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:41:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-07-09 17:41:45,734 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) [2021-07-09 17:41:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-07-09 17:41:45,734 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-07-09 17:41:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:45,734 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-07-09 17:41:45,734 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) [2021-07-09 17:41:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-07-09 17:41:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:45,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:45,735 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-07-09 17:41:45,935 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 464 times [2021-07-09 17:41:45,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:45,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14224699] [2021-07-09 17:41:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:45,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:45,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14224699] [2021-07-09 17:41:45,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14224699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:45,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389127014] [2021-07-09 17:41:45,996 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 [2021-07-09 17:41:46,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:46,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:46,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389127014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:46,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:46,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617919836] [2021-07-09 17:41:46,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:46,275 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) [2021-07-09 17:41:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:46,704 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-07-09 17:41:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:46,704 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 [2021-07-09 17:41:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:46,705 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:41:46,705 INFO L226 Difference]: Without dead ends: 600 [2021-07-09 17:41:46,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-09 17:41:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-07-09 17:41:46,709 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) [2021-07-09 17:41:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-07-09 17:41:46,709 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-07-09 17:41:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:46,709 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-07-09 17:41:46,709 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) [2021-07-09 17:41:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-07-09 17:41:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:46,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:46,710 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:46,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:46,910 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 465 times [2021-07-09 17:41:46,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:46,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511375822] [2021-07-09 17:41:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:46,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511375822] [2021-07-09 17:41:46,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511375822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004383884] [2021-07-09 17:41:46,972 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 [2021-07-09 17:41:47,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004383884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:47,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:47,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129475800] [2021-07-09 17:41:47,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:47,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:47,241 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) [2021-07-09 17:41:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,838 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-07-09 17:41:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:47,839 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 [2021-07-09 17:41:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,840 INFO L225 Difference]: With dead ends: 637 [2021-07-09 17:41:47,840 INFO L226 Difference]: Without dead ends: 631 [2021-07-09 17:41:47,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-09 17:41:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-07-09 17:41:47,844 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) [2021-07-09 17:41:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-07-09 17:41:47,844 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-07-09 17:41:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,844 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-07-09 17:41:47,844 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) [2021-07-09 17:41:47,844 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-07-09 17:41:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:47,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,845 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:48,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-09 17:41:48,045 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 466 times [2021-07-09 17:41:48,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257181707] [2021-07-09 17:41:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257181707] [2021-07-09 17:41:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257181707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:48,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596640805] [2021-07-09 17:41:48,110 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 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 [2021-07-09 17:41:48,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596640805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:48,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:48,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:48,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946478992] [2021-07-09 17:41:48,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:48,377 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) [2021-07-09 17:41:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,789 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-07-09 17:41:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:48,789 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 [2021-07-09 17:41:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,790 INFO L225 Difference]: With dead ends: 608 [2021-07-09 17:41:48,790 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 17:41:48,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 17:41:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-07-09 17:41:48,794 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) [2021-07-09 17:41:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-09 17:41:48,795 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-09 17:41:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,795 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-09 17:41:48,795 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) [2021-07-09 17:41:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-09 17:41:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:48,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,795 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:48,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:48,996 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 467 times [2021-07-09 17:41:48,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429980259] [2021-07-09 17:41:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:49,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:49,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429980259] [2021-07-09 17:41:49,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429980259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674151675] [2021-07-09 17:41:49,061 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 [2021-07-09 17:41:49,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:49,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:49,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:49,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674151675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:49,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271605076] [2021-07-09 17:41:49,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:49,362 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) [2021-07-09 17:41:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:49,680 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-07-09 17:41:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:49,680 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 [2021-07-09 17:41:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:49,681 INFO L225 Difference]: With dead ends: 489 [2021-07-09 17:41:49,681 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:41:49,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:41:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-07-09 17:41:49,685 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) [2021-07-09 17:41:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-07-09 17:41:49,685 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-07-09 17:41:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:49,685 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-07-09 17:41:49,685 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) [2021-07-09 17:41:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-07-09 17:41:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:49,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:49,686 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:49,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:49,886 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 468 times [2021-07-09 17:41:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:49,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853608254] [2021-07-09 17:41:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:49,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853608254] [2021-07-09 17:41:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853608254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254514571] [2021-07-09 17:41:49,949 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 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 [2021-07-09 17:41:50,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:50,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254514571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:50,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:50,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402886609] [2021-07-09 17:41:50,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:50,229 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) [2021-07-09 17:41:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:50,541 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-07-09 17:41:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:41:50,541 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 [2021-07-09 17:41:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:50,542 INFO L225 Difference]: With dead ends: 495 [2021-07-09 17:41:50,542 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:41:50,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:41:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-07-09 17:41:50,550 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) [2021-07-09 17:41:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-09 17:41:50,551 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-09 17:41:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:50,551 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-09 17:41:50,551 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) [2021-07-09 17:41:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-09 17:41:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:50,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:50,551 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:50,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-07-09 17:41:50,752 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 469 times [2021-07-09 17:41:50,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:50,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143253979] [2021-07-09 17:41:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:50,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143253979] [2021-07-09 17:41:50,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143253979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000517423] [2021-07-09 17:41:50,815 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 [2021-07-09 17:41:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:51,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000517423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:51,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:51,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574767904] [2021-07-09 17:41:51,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:51,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:51,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:51,088 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) [2021-07-09 17:41:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:51,349 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-07-09 17:41:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:51,349 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 [2021-07-09 17:41:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:51,350 INFO L225 Difference]: With dead ends: 459 [2021-07-09 17:41:51,350 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 17:41:51,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 17:41:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-07-09 17:41:51,353 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) [2021-07-09 17:41:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-09 17:41:51,354 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-09 17:41:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:51,354 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-09 17:41:51,354 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) [2021-07-09 17:41:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-09 17:41:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:51,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:51,354 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:51,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4199 [2021-07-09 17:41:51,555 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 470 times [2021-07-09 17:41:51,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:51,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610924257] [2021-07-09 17:41:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:51,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:51,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610924257] [2021-07-09 17:41:51,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610924257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:51,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303907529] [2021-07-09 17:41:51,623 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 [2021-07-09 17:41:51,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:51,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:51,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303907529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:51,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:51,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:51,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261166861] [2021-07-09 17:41:51,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:51,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:51,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:51,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:51,885 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) [2021-07-09 17:41:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:52,202 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-07-09 17:41:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:52,202 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 [2021-07-09 17:41:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:52,203 INFO L225 Difference]: With dead ends: 576 [2021-07-09 17:41:52,203 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:41:52,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:41:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-07-09 17:41:52,207 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) [2021-07-09 17:41:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-09 17:41:52,208 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-09 17:41:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:52,208 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-09 17:41:52,208 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) [2021-07-09 17:41:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-09 17:41:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:52,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:52,208 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:52,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4206,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:52,409 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 471 times [2021-07-09 17:41:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:52,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225643335] [2021-07-09 17:41:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:52,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:52,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225643335] [2021-07-09 17:41:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225643335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:52,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647241367] [2021-07-09 17:41:52,475 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 [2021-07-09 17:41:52,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:52,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:52,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647241367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:52,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:52,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:52,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088579056] [2021-07-09 17:41:52,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:52,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:52,731 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) [2021-07-09 17:41:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:53,116 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-07-09 17:41:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:41:53,117 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 [2021-07-09 17:41:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:53,117 INFO L225 Difference]: With dead ends: 582 [2021-07-09 17:41:53,118 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:41:53,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:41:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-07-09 17:41:53,122 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) [2021-07-09 17:41:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-07-09 17:41:53,122 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-07-09 17:41:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:53,122 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-07-09 17:41:53,122 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) [2021-07-09 17:41:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-07-09 17:41:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:53,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:53,123 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:53,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4218 [2021-07-09 17:41:53,323 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 472 times [2021-07-09 17:41:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:53,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459700173] [2021-07-09 17:41:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:53,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:53,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459700173] [2021-07-09 17:41:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459700173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:53,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740951916] [2021-07-09 17:41:53,392 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 [2021-07-09 17:41:53,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740951916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:53,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:53,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730306304] [2021-07-09 17:41:53,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:53,688 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) [2021-07-09 17:41:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:53,931 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-07-09 17:41:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:53,931 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 [2021-07-09 17:41:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:53,932 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:41:53,932 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:41:53,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:41:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-07-09 17:41:53,935 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) [2021-07-09 17:41:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-07-09 17:41:53,936 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-07-09 17:41:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:53,936 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-07-09 17:41:53,936 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) [2021-07-09 17:41:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-07-09 17:41:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:53,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:53,936 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:54,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:54,137 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 473 times [2021-07-09 17:41:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142632609] [2021-07-09 17:41:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:54,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:54,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142632609] [2021-07-09 17:41:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142632609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:54,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231439661] [2021-07-09 17:41:54,207 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 [2021-07-09 17:41:54,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:54,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:54,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:54,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231439661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:54,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:54,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:54,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633676053] [2021-07-09 17:41:54,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:54,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:54,463 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) [2021-07-09 17:41:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:54,664 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-07-09 17:41:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:54,665 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 [2021-07-09 17:41:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:54,665 INFO L225 Difference]: With dead ends: 507 [2021-07-09 17:41:54,665 INFO L226 Difference]: Without dead ends: 507 [2021-07-09 17:41:54,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-09 17:41:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-07-09 17:41:54,669 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) [2021-07-09 17:41:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-07-09 17:41:54,669 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-07-09 17:41:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:54,670 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-07-09 17:41:54,670 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) [2021-07-09 17:41:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-07-09 17:41:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:54,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:54,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:54,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:54,870 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 474 times [2021-07-09 17:41:54,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:54,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583977361] [2021-07-09 17:41:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:54,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583977361] [2021-07-09 17:41:54,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583977361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317120062] [2021-07-09 17:41:54,938 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 [2021-07-09 17:41:55,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:55,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317120062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:55,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:55,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:55,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166562643] [2021-07-09 17:41:55,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:55,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:55,241 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) [2021-07-09 17:41:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:55,669 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-07-09 17:41:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:41:55,670 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 [2021-07-09 17:41:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:55,670 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:41:55,671 INFO L226 Difference]: Without dead ends: 538 [2021-07-09 17:41:55,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:41:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-09 17:41:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-07-09 17:41:55,674 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) [2021-07-09 17:41:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-07-09 17:41:55,675 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-07-09 17:41:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:55,675 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-07-09 17:41:55,675 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) [2021-07-09 17:41:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-07-09 17:41:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:55,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:55,675 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4242 [2021-07-09 17:41:55,876 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 475 times [2021-07-09 17:41:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:55,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722748170] [2021-07-09 17:41:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:55,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722748170] [2021-07-09 17:41:55,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722748170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80133811] [2021-07-09 17:41:55,943 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 [2021-07-09 17:41:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80133811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:56,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:56,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:56,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579762871] [2021-07-09 17:41:56,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:56,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:56,211 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) [2021-07-09 17:41:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:56,571 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-07-09 17:41:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:56,571 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 [2021-07-09 17:41:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:56,572 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:41:56,572 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:41:56,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 368.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:41:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-07-09 17:41:56,576 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) [2021-07-09 17:41:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-09 17:41:56,576 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-09 17:41:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:56,576 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-09 17:41:56,576 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) [2021-07-09 17:41:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-09 17:41:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:56,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:56,577 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:56,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4254 [2021-07-09 17:41:56,777 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 476 times [2021-07-09 17:41:56,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:56,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106489637] [2021-07-09 17:41:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:56,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106489637] [2021-07-09 17:41:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106489637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794298161] [2021-07-09 17:41:56,837 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 [2021-07-09 17:41:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:57,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794298161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:57,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:57,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759783150] [2021-07-09 17:41:57,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:57,101 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) [2021-07-09 17:41:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:57,407 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-07-09 17:41:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:57,407 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 [2021-07-09 17:41:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:57,407 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:41:57,408 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:41:57,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:41:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-07-09 17:41:57,411 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) [2021-07-09 17:41:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-09 17:41:57,411 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-07-09 17:41:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:57,411 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-09 17:41:57,411 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) [2021-07-09 17:41:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-09 17:41:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:57,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:57,412 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:57,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-07-09 17:41:57,612 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 477 times [2021-07-09 17:41:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:57,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932132420] [2021-07-09 17:41:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:57,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:57,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932132420] [2021-07-09 17:41:57,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932132420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:57,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176978016] [2021-07-09 17:41:57,697 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 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 [2021-07-09 17:41:57,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:57,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:58,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176978016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:58,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:58,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:58,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565836323] [2021-07-09 17:41:58,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:58,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:58,009 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) [2021-07-09 17:41:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:58,358 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-07-09 17:41:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:58,359 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 [2021-07-09 17:41:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:58,359 INFO L225 Difference]: With dead ends: 486 [2021-07-09 17:41:58,359 INFO L226 Difference]: Without dead ends: 480 [2021-07-09 17:41:58,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-09 17:41:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-07-09 17:41:58,363 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) [2021-07-09 17:41:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-07-09 17:41:58,363 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-07-09 17:41:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:58,363 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-07-09 17:41:58,364 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) [2021-07-09 17:41:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-07-09 17:41:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:58,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:58,364 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:58,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-07-09 17:41:58,565 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:58,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 478 times [2021-07-09 17:41:58,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:58,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758432524] [2021-07-09 17:41:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:58,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758432524] [2021-07-09 17:41:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758432524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256779156] [2021-07-09 17:41:58,630 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 [2021-07-09 17:41:58,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:58,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256779156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:58,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:58,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:58,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308776980] [2021-07-09 17:41:58,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:58,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:58,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:58,914 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) [2021-07-09 17:41:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:59,122 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-07-09 17:41:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:41:59,122 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 [2021-07-09 17:41:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:59,123 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:41:59,123 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:41:59,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:41:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-07-09 17:41:59,126 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) [2021-07-09 17:41:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:41:59,126 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-09 17:41:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:59,126 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:41:59,126 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) [2021-07-09 17:41:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:41:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:59,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:59,127 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:59,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:59,327 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 479 times [2021-07-09 17:41:59,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:59,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404474199] [2021-07-09 17:41:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:59,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404474199] [2021-07-09 17:41:59,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404474199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:59,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445856170] [2021-07-09 17:41:59,397 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 [2021-07-09 17:41:59,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:59,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:41:59,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445856170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:59,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:59,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:41:59,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250256486] [2021-07-09 17:41:59,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:41:59,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:41:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:41:59,641 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) [2021-07-09 17:41:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:59,916 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-07-09 17:41:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:59,917 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 [2021-07-09 17:41:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:59,918 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:41:59,918 INFO L226 Difference]: Without dead ends: 586 [2021-07-09 17:41:59,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-09 17:41:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-07-09 17:41:59,922 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) [2021-07-09 17:41:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-07-09 17:41:59,922 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-07-09 17:41:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:59,922 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-07-09 17:41:59,922 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) [2021-07-09 17:41:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-07-09 17:41:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:59,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:59,923 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:00,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-07-09 17:42:00,123 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 480 times [2021-07-09 17:42:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:00,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803256938] [2021-07-09 17:42:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:00,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803256938] [2021-07-09 17:42:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803256938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810435442] [2021-07-09 17:42:00,190 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 [2021-07-09 17:42:00,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:00,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810435442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:00,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:00,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:00,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164453592] [2021-07-09 17:42:00,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:00,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:00,448 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) [2021-07-09 17:42:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:00,661 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-07-09 17:42:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:00,661 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 [2021-07-09 17:42:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:00,662 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:42:00,662 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:42:00,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:42:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-07-09 17:42:00,665 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) [2021-07-09 17:42:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-09 17:42:00,666 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-09 17:42:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:00,666 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-09 17:42:00,666 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) [2021-07-09 17:42:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-09 17:42:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:00,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:00,666 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:00,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:00,867 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 481 times [2021-07-09 17:42:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:00,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958611630] [2021-07-09 17:42:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:00,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:00,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958611630] [2021-07-09 17:42:00,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958611630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:00,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778897223] [2021-07-09 17:42:00,938 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 [2021-07-09 17:42:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:01,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778897223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:01,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:01,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:01,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829012616] [2021-07-09 17:42:01,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:01,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:01,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:01,195 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) [2021-07-09 17:42:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:01,404 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-07-09 17:42:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:01,405 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 [2021-07-09 17:42:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:01,405 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:42:01,405 INFO L226 Difference]: Without dead ends: 592 [2021-07-09 17:42:01,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-09 17:42:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-07-09 17:42:01,409 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) [2021-07-09 17:42:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-07-09 17:42:01,410 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-07-09 17:42:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:01,410 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-07-09 17:42:01,410 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) [2021-07-09 17:42:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-07-09 17:42:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:01,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:01,411 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:01,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:01,611 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 482 times [2021-07-09 17:42:01,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:01,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160301993] [2021-07-09 17:42:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:01,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160301993] [2021-07-09 17:42:01,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160301993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444278635] [2021-07-09 17:42:01,681 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 [2021-07-09 17:42:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444278635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:01,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:01,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255151615] [2021-07-09 17:42:01,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:01,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:01,922 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) [2021-07-09 17:42:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:02,120 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-07-09 17:42:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:02,120 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 [2021-07-09 17:42:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:02,121 INFO L225 Difference]: With dead ends: 555 [2021-07-09 17:42:02,121 INFO L226 Difference]: Without dead ends: 555 [2021-07-09 17:42:02,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-09 17:42:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-07-09 17:42:02,126 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) [2021-07-09 17:42:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-09 17:42:02,127 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-09 17:42:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:02,127 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-09 17:42:02,127 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) [2021-07-09 17:42:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-09 17:42:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:02,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:02,128 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:02,343 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 483 times [2021-07-09 17:42:02,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:02,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508534553] [2021-07-09 17:42:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:02,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508534553] [2021-07-09 17:42:02,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508534553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215129866] [2021-07-09 17:42:02,417 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 [2021-07-09 17:42:02,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:02,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:02,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215129866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:02,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:02,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:02,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24941773] [2021-07-09 17:42:02,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:02,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:02,696 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) [2021-07-09 17:42:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:02,899 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-07-09 17:42:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:02,900 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 [2021-07-09 17:42:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:02,901 INFO L225 Difference]: With dead ends: 580 [2021-07-09 17:42:02,901 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:42:02,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:42:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-07-09 17:42:02,904 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) [2021-07-09 17:42:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-09 17:42:02,905 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-09 17:42:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:02,905 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-09 17:42:02,905 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) [2021-07-09 17:42:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-09 17:42:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:02,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:02,906 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:03,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-07-09 17:42:03,106 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 484 times [2021-07-09 17:42:03,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:03,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834091046] [2021-07-09 17:42:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:03,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:03,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834091046] [2021-07-09 17:42:03,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834091046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:03,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169292330] [2021-07-09 17:42:03,175 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 [2021-07-09 17:42:03,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:03,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:03,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169292330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:03,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:03,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33428614] [2021-07-09 17:42:03,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:03,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:03,415 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) [2021-07-09 17:42:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:03,727 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-07-09 17:42:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:03,727 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 [2021-07-09 17:42:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:03,728 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:42:03,728 INFO L226 Difference]: Without dead ends: 586 [2021-07-09 17:42:03,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-09 17:42:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-07-09 17:42:03,732 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) [2021-07-09 17:42:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-07-09 17:42:03,733 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-07-09 17:42:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:03,733 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-07-09 17:42:03,733 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) [2021-07-09 17:42:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-07-09 17:42:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:03,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:03,733 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:03,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-07-09 17:42:03,934 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:03,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 485 times [2021-07-09 17:42:03,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:03,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831353561] [2021-07-09 17:42:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831353561] [2021-07-09 17:42:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831353561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716124511] [2021-07-09 17:42:04,004 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 [2021-07-09 17:42:04,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716124511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:04,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:04,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110360941] [2021-07-09 17:42:04,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:04,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:04,270 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) [2021-07-09 17:42:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:04,458 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-07-09 17:42:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:04,459 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 [2021-07-09 17:42:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:04,459 INFO L225 Difference]: With dead ends: 516 [2021-07-09 17:42:04,459 INFO L226 Difference]: Without dead ends: 516 [2021-07-09 17:42:04,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-09 17:42:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-07-09 17:42:04,463 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) [2021-07-09 17:42:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-07-09 17:42:04,464 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-07-09 17:42:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:04,464 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-07-09 17:42:04,464 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) [2021-07-09 17:42:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-07-09 17:42:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:04,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:04,464 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:04,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-07-09 17:42:04,665 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 486 times [2021-07-09 17:42:04,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:04,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045800619] [2021-07-09 17:42:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:04,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045800619] [2021-07-09 17:42:04,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045800619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103496531] [2021-07-09 17:42:04,734 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 [2021-07-09 17:42:04,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103496531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:04,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:04,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254407142] [2021-07-09 17:42:04,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:04,980 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) [2021-07-09 17:42:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:05,231 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-07-09 17:42:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:05,232 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 [2021-07-09 17:42:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:05,232 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:42:05,232 INFO L226 Difference]: Without dead ends: 504 [2021-07-09 17:42:05,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-09 17:42:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-07-09 17:42:05,236 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) [2021-07-09 17:42:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-09 17:42:05,236 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-09 17:42:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:05,236 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-09 17:42:05,236 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) [2021-07-09 17:42:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-09 17:42:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:05,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:05,237 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:05,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-07-09 17:42:05,437 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 487 times [2021-07-09 17:42:05,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:05,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642044830] [2021-07-09 17:42:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642044830] [2021-07-09 17:42:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642044830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177021093] [2021-07-09 17:42:05,505 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 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 [2021-07-09 17:42:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:05,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:05,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177021093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:05,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:05,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:05,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144474687] [2021-07-09 17:42:05,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:05,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:05,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:05,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:05,731 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) [2021-07-09 17:42:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:05,921 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-07-09 17:42:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:05,921 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 [2021-07-09 17:42:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:05,922 INFO L225 Difference]: With dead ends: 459 [2021-07-09 17:42:05,922 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:42:05,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:42:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-07-09 17:42:05,925 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) [2021-07-09 17:42:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-07-09 17:42:05,926 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-07-09 17:42:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:05,926 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-07-09 17:42:05,926 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) [2021-07-09 17:42:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-07-09 17:42:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:05,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:05,926 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:06,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-07-09 17:42:06,127 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 488 times [2021-07-09 17:42:06,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:06,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932055175] [2021-07-09 17:42:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932055175] [2021-07-09 17:42:06,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932055175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543044372] [2021-07-09 17:42:06,191 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 [2021-07-09 17:42:06,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:06,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:06,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543044372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:06,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:06,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020705514] [2021-07-09 17:42:06,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:06,452 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) [2021-07-09 17:42:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:06,653 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-07-09 17:42:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:06,653 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 [2021-07-09 17:42:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:06,654 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:42:06,654 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:42:06,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:42:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-07-09 17:42:06,657 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) [2021-07-09 17:42:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-07-09 17:42:06,658 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-07-09 17:42:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:06,658 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-07-09 17:42:06,658 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) [2021-07-09 17:42:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-07-09 17:42:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:06,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:06,658 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:06,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:06,859 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:06,859 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 489 times [2021-07-09 17:42:06,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:06,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942527294] [2021-07-09 17:42:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:06,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:06,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942527294] [2021-07-09 17:42:06,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942527294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:06,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102248381] [2021-07-09 17:42:06,924 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 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 [2021-07-09 17:42:07,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:07,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102248381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:07,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:07,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110968405] [2021-07-09 17:42:07,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:07,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:07,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:07,164 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) [2021-07-09 17:42:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:07,386 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-07-09 17:42:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:07,386 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 [2021-07-09 17:42:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:07,387 INFO L225 Difference]: With dead ends: 510 [2021-07-09 17:42:07,387 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 17:42:07,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 17:42:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-07-09 17:42:07,391 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) [2021-07-09 17:42:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-09 17:42:07,391 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-09 17:42:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:07,391 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-09 17:42:07,391 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) [2021-07-09 17:42:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-09 17:42:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:07,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:07,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:07,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-07-09 17:42:07,592 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 490 times [2021-07-09 17:42:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:07,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458858784] [2021-07-09 17:42:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:07,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:07,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458858784] [2021-07-09 17:42:07,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458858784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820740824] [2021-07-09 17:42:07,659 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 [2021-07-09 17:42:07,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:07,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:07,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820740824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:07,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:07,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271439685] [2021-07-09 17:42:07,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:07,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:07,904 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) [2021-07-09 17:42:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:08,124 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-07-09 17:42:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:08,125 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 [2021-07-09 17:42:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:08,125 INFO L225 Difference]: With dead ends: 479 [2021-07-09 17:42:08,126 INFO L226 Difference]: Without dead ends: 479 [2021-07-09 17:42:08,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-09 17:42:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-07-09 17:42:08,129 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) [2021-07-09 17:42:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:42:08,129 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-09 17:42:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:08,129 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:42:08,129 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) [2021-07-09 17:42:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:42:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:08,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:08,130 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:08,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:08,330 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 491 times [2021-07-09 17:42:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:08,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716631387] [2021-07-09 17:42:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:08,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716631387] [2021-07-09 17:42:08,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716631387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344259406] [2021-07-09 17:42:08,387 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 [2021-07-09 17:42:08,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:08,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344259406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:08,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:08,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:08,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063283719] [2021-07-09 17:42:08,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:08,622 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) [2021-07-09 17:42:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:08,816 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-07-09 17:42:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:08,816 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 [2021-07-09 17:42:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:08,817 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:42:08,817 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:42:08,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:42:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-07-09 17:42:08,820 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) [2021-07-09 17:42:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-07-09 17:42:08,820 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-07-09 17:42:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:08,820 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-07-09 17:42:08,821 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) [2021-07-09 17:42:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-07-09 17:42:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:08,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:08,821 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:09,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:09,021 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:09,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 492 times [2021-07-09 17:42:09,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:09,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126115411] [2021-07-09 17:42:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:09,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:09,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126115411] [2021-07-09 17:42:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126115411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:09,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123856313] [2021-07-09 17:42:09,080 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 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 [2021-07-09 17:42:09,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:09,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123856313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:09,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:09,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:09,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027582382] [2021-07-09 17:42:09,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:09,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:09,309 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) [2021-07-09 17:42:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:09,529 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-07-09 17:42:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:09,529 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 [2021-07-09 17:42:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:09,530 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:42:09,530 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:42:09,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:42:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-07-09 17:42:09,534 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) [2021-07-09 17:42:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-07-09 17:42:09,534 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-07-09 17:42:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:09,534 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-07-09 17:42:09,534 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) [2021-07-09 17:42:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-07-09 17:42:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:09,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:09,535 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:09,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:09,735 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 493 times [2021-07-09 17:42:09,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384134075] [2021-07-09 17:42:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:09,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:09,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384134075] [2021-07-09 17:42:09,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384134075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:09,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718794755] [2021-07-09 17:42:09,801 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 [2021-07-09 17:42:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:09,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:10,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718794755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:10,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621552378] [2021-07-09 17:42:10,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:10,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:10,029 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) [2021-07-09 17:42:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:10,202 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-07-09 17:42:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:10,202 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 [2021-07-09 17:42:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:10,203 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:42:10,203 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 17:42:10,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 17:42:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-07-09 17:42:10,206 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) [2021-07-09 17:42:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-07-09 17:42:10,207 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-07-09 17:42:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:10,207 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-07-09 17:42:10,207 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) [2021-07-09 17:42:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-07-09 17:42:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:10,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:10,207 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:10,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:10,408 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 494 times [2021-07-09 17:42:10,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:10,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869461825] [2021-07-09 17:42:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:10,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:10,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869461825] [2021-07-09 17:42:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869461825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698544725] [2021-07-09 17:42:10,472 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 [2021-07-09 17:42:10,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:10,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698544725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:10,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:10,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943374860] [2021-07-09 17:42:10,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:10,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:10,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:10,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:10,693 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) [2021-07-09 17:42:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:10,855 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-07-09 17:42:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:10,855 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 [2021-07-09 17:42:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:10,856 INFO L225 Difference]: With dead ends: 482 [2021-07-09 17:42:10,856 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 17:42:10,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 17:42:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-07-09 17:42:10,859 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) [2021-07-09 17:42:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-07-09 17:42:10,860 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-07-09 17:42:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:10,860 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-07-09 17:42:10,860 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) [2021-07-09 17:42:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-07-09 17:42:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:10,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:10,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:11,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:11,061 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 495 times [2021-07-09 17:42:11,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:11,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544917166] [2021-07-09 17:42:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:11,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:11,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544917166] [2021-07-09 17:42:11,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544917166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:11,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915420357] [2021-07-09 17:42:11,122 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 [2021-07-09 17:42:11,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:11,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915420357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:11,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:11,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:11,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416394382] [2021-07-09 17:42:11,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:11,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:11,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:11,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:11,340 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) [2021-07-09 17:42:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:11,556 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-07-09 17:42:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:11,557 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 [2021-07-09 17:42:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:11,557 INFO L225 Difference]: With dead ends: 482 [2021-07-09 17:42:11,557 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:42:11,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:42:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-07-09 17:42:11,561 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) [2021-07-09 17:42:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-07-09 17:42:11,562 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-07-09 17:42:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:11,562 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-07-09 17:42:11,562 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) [2021-07-09 17:42:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-07-09 17:42:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:11,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:11,562 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:11,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-07-09 17:42:11,763 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 496 times [2021-07-09 17:42:11,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:11,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302124989] [2021-07-09 17:42:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:11,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302124989] [2021-07-09 17:42:11,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302124989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159584049] [2021-07-09 17:42:11,822 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 [2021-07-09 17:42:11,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:11,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:12,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159584049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:12,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:12,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934108416] [2021-07-09 17:42:12,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:12,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:12,030 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) [2021-07-09 17:42:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:12,178 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-07-09 17:42:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:12,179 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 [2021-07-09 17:42:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:12,179 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:42:12,179 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:42:12,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:42:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:42:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-07-09 17:42:12,183 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) [2021-07-09 17:42:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-09 17:42:12,183 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-09 17:42:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:12,183 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-09 17:42:12,183 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) [2021-07-09 17:42:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-09 17:42:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:12,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:12,184 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:12,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:12,384 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 497 times [2021-07-09 17:42:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:12,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661032231] [2021-07-09 17:42:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:12,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:12,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661032231] [2021-07-09 17:42:12,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661032231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515442641] [2021-07-09 17:42:12,437 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 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 [2021-07-09 17:42:12,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:12,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515442641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:12,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:12,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155975069] [2021-07-09 17:42:12,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:12,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:12,643 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) [2021-07-09 17:42:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:12,899 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-07-09 17:42:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:12,899 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 [2021-07-09 17:42:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:12,900 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:42:12,900 INFO L226 Difference]: Without dead ends: 511 [2021-07-09 17:42:12,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-09 17:42:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-07-09 17:42:12,903 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) [2021-07-09 17:42:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-09 17:42:12,904 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-09 17:42:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:12,904 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-09 17:42:12,904 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) [2021-07-09 17:42:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-09 17:42:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:12,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:12,904 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:13,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4438 [2021-07-09 17:42:13,105 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 498 times [2021-07-09 17:42:13,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:13,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522895026] [2021-07-09 17:42:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:13,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522895026] [2021-07-09 17:42:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522895026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044516937] [2021-07-09 17:42:13,160 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 [2021-07-09 17:42:13,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:13,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044516937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:13,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:13,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:13,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515652181] [2021-07-09 17:42:13,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:13,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:13,396 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) [2021-07-09 17:42:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:13,662 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-07-09 17:42:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:13,663 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 [2021-07-09 17:42:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:13,663 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:42:13,663 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:42:13,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:42:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-07-09 17:42:13,667 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) [2021-07-09 17:42:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-09 17:42:13,667 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-09 17:42:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:13,667 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-09 17:42:13,667 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) [2021-07-09 17:42:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-09 17:42:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:13,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:13,668 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:13,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:13,868 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 499 times [2021-07-09 17:42:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:13,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514294122] [2021-07-09 17:42:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:13,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:13,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514294122] [2021-07-09 17:42:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514294122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:13,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121852667] [2021-07-09 17:42:13,924 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 [2021-07-09 17:42:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:14,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121852667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:14,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:14,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730705497] [2021-07-09 17:42:14,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:14,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:14,153 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) [2021-07-09 17:42:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:14,539 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-07-09 17:42:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:14,540 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 [2021-07-09 17:42:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:14,540 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:42:14,541 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:42:14,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:42:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-07-09 17:42:14,544 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) [2021-07-09 17:42:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-09 17:42:14,545 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-09 17:42:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:14,545 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-09 17:42:14,545 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) [2021-07-09 17:42:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-09 17:42:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:14,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:14,545 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:14,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-07-09 17:42:14,746 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 500 times [2021-07-09 17:42:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:14,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572758061] [2021-07-09 17:42:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:14,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572758061] [2021-07-09 17:42:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572758061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124468977] [2021-07-09 17:42:14,804 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 [2021-07-09 17:42:14,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:14,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:14,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124468977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:15,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:15,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069049488] [2021-07-09 17:42:15,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:15,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:15,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:15,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:15,034 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) [2021-07-09 17:42:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:15,294 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-07-09 17:42:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:15,294 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 [2021-07-09 17:42:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:15,295 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:42:15,295 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:42:15,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:42:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-07-09 17:42:15,299 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) [2021-07-09 17:42:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-07-09 17:42:15,299 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-07-09 17:42:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:15,299 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-07-09 17:42:15,299 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) [2021-07-09 17:42:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-07-09 17:42:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:15,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:15,300 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:15,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:15,500 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 501 times [2021-07-09 17:42:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:15,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38473509] [2021-07-09 17:42:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:15,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38473509] [2021-07-09 17:42:15,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38473509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710565040] [2021-07-09 17:42:15,552 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 [2021-07-09 17:42:15,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:42:15,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710565040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321368087] [2021-07-09 17:42:15,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:15,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:15,769 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) [2021-07-09 17:42:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:15,980 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-07-09 17:42:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:15,980 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 [2021-07-09 17:42:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:15,981 INFO L225 Difference]: With dead ends: 470 [2021-07-09 17:42:15,981 INFO L226 Difference]: Without dead ends: 458 [2021-07-09 17:42:15,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-09 17:42:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-07-09 17:42:15,984 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) [2021-07-09 17:42:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-09 17:42:15,985 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-09 17:42:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-09 17:42:15,985 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) [2021-07-09 17:42:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-09 17:42:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:15,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:15,985 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:16,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4461 [2021-07-09 17:42:16,186 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:16,186 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 502 times [2021-07-09 17:42:16,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:16,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990957336] [2021-07-09 17:42:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:16,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990957336] [2021-07-09 17:42:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990957336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390053517] [2021-07-09 17:42:16,239 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 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 [2021-07-09 17:42:16,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:16,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:16,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390053517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:16,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:16,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:16,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827363827] [2021-07-09 17:42:16,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:16,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:16,450 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) [2021-07-09 17:42:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:16,694 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-07-09 17:42:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:16,694 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 [2021-07-09 17:42:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:16,695 INFO L225 Difference]: With dead ends: 495 [2021-07-09 17:42:16,695 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:42:16,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:42:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-07-09 17:42:16,698 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) [2021-07-09 17:42:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-09 17:42:16,699 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-09 17:42:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:16,699 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-09 17:42:16,699 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) [2021-07-09 17:42:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-09 17:42:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:16,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:16,699 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:16,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4466,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:16,900 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 503 times [2021-07-09 17:42:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9182766] [2021-07-09 17:42:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:16,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:16,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9182766] [2021-07-09 17:42:16,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9182766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:16,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082838525] [2021-07-09 17:42:16,954 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 [2021-07-09 17:42:17,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:17,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082838525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:17,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:17,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004034072] [2021-07-09 17:42:17,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:17,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:17,165 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) [2021-07-09 17:42:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:17,361 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-07-09 17:42:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:17,362 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 [2021-07-09 17:42:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:17,362 INFO L225 Difference]: With dead ends: 466 [2021-07-09 17:42:17,362 INFO L226 Difference]: Without dead ends: 466 [2021-07-09 17:42:17,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-09 17:42:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-07-09 17:42:17,366 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) [2021-07-09 17:42:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-09 17:42:17,366 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-09 17:42:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:17,366 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-09 17:42:17,366 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) [2021-07-09 17:42:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-09 17:42:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:17,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:17,367 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:17,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-07-09 17:42:17,567 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 504 times [2021-07-09 17:42:17,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:17,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440919361] [2021-07-09 17:42:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:17,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440919361] [2021-07-09 17:42:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440919361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642991250] [2021-07-09 17:42:17,621 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 [2021-07-09 17:42:17,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:17,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:17,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:17,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:17,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642991250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:17,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:17,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031513576] [2021-07-09 17:42:17,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:17,828 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) [2021-07-09 17:42:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:18,037 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-07-09 17:42:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:18,038 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 [2021-07-09 17:42:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:18,038 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:42:18,038 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:42:18,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:42:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-07-09 17:42:18,042 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) [2021-07-09 17:42:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-07-09 17:42:18,042 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-07-09 17:42:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:18,043 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-07-09 17:42:18,043 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) [2021-07-09 17:42:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-07-09 17:42:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:18,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:18,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:18,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,244 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 505 times [2021-07-09 17:42:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:18,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404738339] [2021-07-09 17:42:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:18,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404738339] [2021-07-09 17:42:18,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404738339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721433060] [2021-07-09 17:42:18,301 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 [2021-07-09 17:42:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:18,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721433060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:18,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:18,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:18,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832243075] [2021-07-09 17:42:18,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:18,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:18,535 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) [2021-07-09 17:42:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:18,765 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-07-09 17:42:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:18,765 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 [2021-07-09 17:42:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:18,766 INFO L225 Difference]: With dead ends: 501 [2021-07-09 17:42:18,766 INFO L226 Difference]: Without dead ends: 501 [2021-07-09 17:42:18,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-09 17:42:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-07-09 17:42:18,770 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) [2021-07-09 17:42:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-07-09 17:42:18,770 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-07-09 17:42:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:18,770 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-07-09 17:42:18,770 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) [2021-07-09 17:42:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-07-09 17:42:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:18,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:18,771 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:18,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,971 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 506 times [2021-07-09 17:42:18,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:18,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928261040] [2021-07-09 17:42:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:19,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:19,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928261040] [2021-07-09 17:42:19,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928261040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:19,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700006997] [2021-07-09 17:42:19,025 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 [2021-07-09 17:42:19,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:19,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:19,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700006997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:19,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:19,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:42:19,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030751884] [2021-07-09 17:42:19,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:42:19,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:19,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:42:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:42:19,221 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) [2021-07-09 17:42:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:19,414 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-07-09 17:42:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:19,414 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 [2021-07-09 17:42:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:19,415 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:42:19,415 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 17:42:19,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:42:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 17:42:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-07-09 17:42:19,418 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) [2021-07-09 17:42:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-09 17:42:19,419 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-09 17:42:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:19,419 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-09 17:42:19,419 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) [2021-07-09 17:42:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-09 17:42:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:19,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:19,419 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:19,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:19,620 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 507 times [2021-07-09 17:42:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:19,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774763085] [2021-07-09 17:42:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:19,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774763085] [2021-07-09 17:42:19,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774763085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:19,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463940328] [2021-07-09 17:42:19,688 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 [2021-07-09 17:42:19,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:42:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463940328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:19,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:19,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:19,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014932427] [2021-07-09 17:42:19,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:19,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:19,973 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) [2021-07-09 17:42:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:20,235 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-07-09 17:42:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:20,235 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 [2021-07-09 17:42:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:20,236 INFO L225 Difference]: With dead ends: 481 [2021-07-09 17:42:20,236 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:42:20,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:42:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-07-09 17:42:20,239 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) [2021-07-09 17:42:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-07-09 17:42:20,240 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-07-09 17:42:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:20,240 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-07-09 17:42:20,240 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) [2021-07-09 17:42:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-07-09 17:42:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:20,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:20,240 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-07-09 17:42:20,441 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 508 times [2021-07-09 17:42:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80640695] [2021-07-09 17:42:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:20,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:20,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80640695] [2021-07-09 17:42:20,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80640695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:20,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310711175] [2021-07-09 17:42:20,508 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 [2021-07-09 17:42:20,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:20,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:20,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310711175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:20,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:20,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265309578] [2021-07-09 17:42:20,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:20,770 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) [2021-07-09 17:42:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:21,037 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-07-09 17:42:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:21,037 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 [2021-07-09 17:42:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:21,038 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:42:21,038 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:42:21,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:42:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-07-09 17:42:21,041 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) [2021-07-09 17:42:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-09 17:42:21,042 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-09 17:42:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:21,042 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-09 17:42:21,042 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) [2021-07-09 17:42:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-09 17:42:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:21,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:21,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:21,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:21,243 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 509 times [2021-07-09 17:42:21,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:21,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853158982] [2021-07-09 17:42:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:21,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:21,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853158982] [2021-07-09 17:42:21,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853158982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:21,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930819294] [2021-07-09 17:42:21,308 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 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 [2021-07-09 17:42:21,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:21,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:21,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930819294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:21,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:21,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:21,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886645951] [2021-07-09 17:42:21,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:21,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:21,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:21,596 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) [2021-07-09 17:42:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:21,872 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-07-09 17:42:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:21,872 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 [2021-07-09 17:42:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:21,873 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:42:21,873 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:42:21,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:42:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-07-09 17:42:21,877 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) [2021-07-09 17:42:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-09 17:42:21,878 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-09 17:42:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:21,878 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-09 17:42:21,878 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) [2021-07-09 17:42:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-09 17:42:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:21,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:21,878 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:22,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-07-09 17:42:22,079 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 510 times [2021-07-09 17:42:22,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:22,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535387109] [2021-07-09 17:42:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:22,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:22,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535387109] [2021-07-09 17:42:22,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535387109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:22,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206120201] [2021-07-09 17:42:22,148 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 [2021-07-09 17:42:22,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:22,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206120201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:22,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:22,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597801402] [2021-07-09 17:42:22,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:22,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:22,449 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) [2021-07-09 17:42:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:22,789 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-07-09 17:42:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:22,789 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 [2021-07-09 17:42:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:22,790 INFO L225 Difference]: With dead ends: 568 [2021-07-09 17:42:22,790 INFO L226 Difference]: Without dead ends: 568 [2021-07-09 17:42:22,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-09 17:42:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-07-09 17:42:22,794 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) [2021-07-09 17:42:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-07-09 17:42:22,795 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-07-09 17:42:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:22,795 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-07-09 17:42:22,795 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) [2021-07-09 17:42:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-07-09 17:42:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:22,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:22,795 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:22,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4515,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:22,996 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 511 times [2021-07-09 17:42:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:22,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639300420] [2021-07-09 17:42:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:23,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:23,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639300420] [2021-07-09 17:42:23,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639300420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:23,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728007414] [2021-07-09 17:42:23,063 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 [2021-07-09 17:42:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:23,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:23,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:23,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728007414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:23,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:23,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:23,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24909803] [2021-07-09 17:42:23,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:23,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:23,382 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) [2021-07-09 17:42:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:23,759 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-07-09 17:42:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:42:23,759 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 [2021-07-09 17:42:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:23,760 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:42:23,760 INFO L226 Difference]: Without dead ends: 568 [2021-07-09 17:42:23,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-09 17:42:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-07-09 17:42:23,764 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) [2021-07-09 17:42:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-07-09 17:42:23,765 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-07-09 17:42:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:23,765 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-07-09 17:42:23,765 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) [2021-07-09 17:42:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-07-09 17:42:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:23,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:23,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:23,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4525,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:23,966 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 512 times [2021-07-09 17:42:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:23,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427853082] [2021-07-09 17:42:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:24,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:24,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427853082] [2021-07-09 17:42:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427853082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:24,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825338550] [2021-07-09 17:42:24,047 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 [2021-07-09 17:42:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:24,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825338550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:24,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:24,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:24,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583423941] [2021-07-09 17:42:24,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:24,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:24,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:24,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:24,323 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) [2021-07-09 17:42:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:24,547 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-07-09 17:42:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:24,547 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 [2021-07-09 17:42:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:24,548 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:42:24,548 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:42:24,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:42:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-07-09 17:42:24,552 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) [2021-07-09 17:42:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-07-09 17:42:24,552 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-07-09 17:42:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:24,552 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-07-09 17:42:24,553 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) [2021-07-09 17:42:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-07-09 17:42:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:24,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:24,553 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:24,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:24,753 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 513 times [2021-07-09 17:42:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:24,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997023952] [2021-07-09 17:42:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:24,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:24,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997023952] [2021-07-09 17:42:24,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997023952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:24,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764192304] [2021-07-09 17:42:24,823 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 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 [2021-07-09 17:42:24,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:24,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:24,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:24,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764192304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:25,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:25,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700392551] [2021-07-09 17:42:25,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:25,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:25,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:25,082 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) [2021-07-09 17:42:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:25,278 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-07-09 17:42:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:25,278 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 [2021-07-09 17:42:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:25,279 INFO L225 Difference]: With dead ends: 499 [2021-07-09 17:42:25,279 INFO L226 Difference]: Without dead ends: 499 [2021-07-09 17:42:25,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-07-09 17:42:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-07-09 17:42:25,283 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) [2021-07-09 17:42:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-07-09 17:42:25,283 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-07-09 17:42:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:25,283 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-07-09 17:42:25,283 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) [2021-07-09 17:42:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-07-09 17:42:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:25,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:25,284 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:25,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:25,484 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:25,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 514 times [2021-07-09 17:42:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359151248] [2021-07-09 17:42:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359151248] [2021-07-09 17:42:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359151248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818507885] [2021-07-09 17:42:25,551 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 [2021-07-09 17:42:25,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818507885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:25,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676401662] [2021-07-09 17:42:25,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:25,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:25,861 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) [2021-07-09 17:42:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:26,250 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-07-09 17:42:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:42:26,250 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 [2021-07-09 17:42:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:26,251 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:42:26,251 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:42:26,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:42:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-07-09 17:42:26,255 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) [2021-07-09 17:42:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-07-09 17:42:26,255 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-07-09 17:42:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:26,255 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-07-09 17:42:26,255 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) [2021-07-09 17:42:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-07-09 17:42:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:26,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:26,256 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:26,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:26,456 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 515 times [2021-07-09 17:42:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:26,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157668352] [2021-07-09 17:42:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:26,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:26,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157668352] [2021-07-09 17:42:26,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157668352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:26,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090163086] [2021-07-09 17:42:26,524 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 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 [2021-07-09 17:42:26,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:26,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:26,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090163086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:26,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:26,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:26,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984827290] [2021-07-09 17:42:26,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:26,799 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) [2021-07-09 17:42:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:27,100 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-07-09 17:42:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:27,100 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 [2021-07-09 17:42:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:27,101 INFO L225 Difference]: With dead ends: 513 [2021-07-09 17:42:27,101 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:42:27,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:42:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-07-09 17:42:27,104 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) [2021-07-09 17:42:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-07-09 17:42:27,105 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-07-09 17:42:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:27,105 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-07-09 17:42:27,105 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) [2021-07-09 17:42:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-07-09 17:42:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:27,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:27,105 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:27,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:27,306 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 516 times [2021-07-09 17:42:27,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:27,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104644060] [2021-07-09 17:42:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:27,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:27,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104644060] [2021-07-09 17:42:27,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104644060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:27,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158842204] [2021-07-09 17:42:27,368 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 [2021-07-09 17:42:27,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:27,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158842204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:27,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:27,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:27,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470856647] [2021-07-09 17:42:27,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:27,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:27,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:27,636 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) [2021-07-09 17:42:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:27,919 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-07-09 17:42:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:27,919 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 [2021-07-09 17:42:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:27,920 INFO L225 Difference]: With dead ends: 453 [2021-07-09 17:42:27,920 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:42:27,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:42:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-07-09 17:42:27,923 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) [2021-07-09 17:42:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-07-09 17:42:27,924 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-07-09 17:42:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:27,924 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-07-09 17:42:27,924 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) [2021-07-09 17:42:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-07-09 17:42:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:27,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:27,924 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:28,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-07-09 17:42:28,125 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 517 times [2021-07-09 17:42:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:28,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727589570] [2021-07-09 17:42:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:28,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727589570] [2021-07-09 17:42:28,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727589570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715864444] [2021-07-09 17:42:28,190 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 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 [2021-07-09 17:42:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715864444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:28,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:28,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197584575] [2021-07-09 17:42:28,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:28,458 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) [2021-07-09 17:42:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:28,797 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-07-09 17:42:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:28,797 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 [2021-07-09 17:42:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:28,798 INFO L225 Difference]: With dead ends: 478 [2021-07-09 17:42:28,798 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:42:28,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:42:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-07-09 17:42:28,802 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) [2021-07-09 17:42:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-07-09 17:42:28,802 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-07-09 17:42:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:28,802 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-07-09 17:42:28,802 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) [2021-07-09 17:42:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-07-09 17:42:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:28,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:28,803 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:29,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-07-09 17:42:29,003 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 518 times [2021-07-09 17:42:29,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:29,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468089663] [2021-07-09 17:42:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:29,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:29,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468089663] [2021-07-09 17:42:29,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468089663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:29,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809546864] [2021-07-09 17:42:29,074 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 [2021-07-09 17:42:29,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:29,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:29,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809546864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:29,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:29,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342186946] [2021-07-09 17:42:29,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:29,360 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) [2021-07-09 17:42:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:29,626 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-07-09 17:42:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:29,626 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 [2021-07-09 17:42:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:29,627 INFO L225 Difference]: With dead ends: 449 [2021-07-09 17:42:29,627 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:42:29,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:42:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-07-09 17:42:29,630 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) [2021-07-09 17:42:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:42:29,631 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-09 17:42:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:29,631 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:42:29,631 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) [2021-07-09 17:42:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:42:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:29,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:29,631 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:29,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-07-09 17:42:29,832 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:29,832 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 519 times [2021-07-09 17:42:29,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:29,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342432967] [2021-07-09 17:42:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:29,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342432967] [2021-07-09 17:42:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342432967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815226736] [2021-07-09 17:42:29,900 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 [2021-07-09 17:42:30,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:30,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:30,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815226736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:30,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:30,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906925225] [2021-07-09 17:42:30,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:30,187 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) [2021-07-09 17:42:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:30,479 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-07-09 17:42:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:30,479 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 [2021-07-09 17:42:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:30,480 INFO L225 Difference]: With dead ends: 578 [2021-07-09 17:42:30,480 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:42:30,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:42:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-07-09 17:42:30,484 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) [2021-07-09 17:42:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-07-09 17:42:30,484 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-07-09 17:42:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:30,485 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-07-09 17:42:30,485 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) [2021-07-09 17:42:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-07-09 17:42:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:30,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:30,485 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:30,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4600,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:30,686 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 520 times [2021-07-09 17:42:30,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:30,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745744357] [2021-07-09 17:42:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:30,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745744357] [2021-07-09 17:42:30,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745744357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723650193] [2021-07-09 17:42:30,752 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 [2021-07-09 17:42:30,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:30,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:31,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723650193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:31,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:31,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184562909] [2021-07-09 17:42:31,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:31,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:31,001 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) [2021-07-09 17:42:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:31,221 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-07-09 17:42:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:31,221 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 [2021-07-09 17:42:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:31,222 INFO L225 Difference]: With dead ends: 532 [2021-07-09 17:42:31,222 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 17:42:31,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 17:42:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-07-09 17:42:31,226 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) [2021-07-09 17:42:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-09 17:42:31,226 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-09 17:42:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:31,226 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-09 17:42:31,226 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) [2021-07-09 17:42:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-09 17:42:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:31,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:31,227 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:31,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4609 [2021-07-09 17:42:31,427 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 521 times [2021-07-09 17:42:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:31,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277609135] [2021-07-09 17:42:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:31,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:31,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277609135] [2021-07-09 17:42:31,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277609135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:31,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678194553] [2021-07-09 17:42:31,505 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 [2021-07-09 17:42:31,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678194553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:31,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:31,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:31,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440369152] [2021-07-09 17:42:31,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:31,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:31,772 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) [2021-07-09 17:42:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:32,014 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-07-09 17:42:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:32,014 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 [2021-07-09 17:42:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:32,015 INFO L225 Difference]: With dead ends: 584 [2021-07-09 17:42:32,015 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 17:42:32,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 17:42:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-07-09 17:42:32,019 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) [2021-07-09 17:42:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-07-09 17:42:32,020 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-07-09 17:42:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:32,020 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-07-09 17:42:32,020 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) [2021-07-09 17:42:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-07-09 17:42:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:32,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:32,020 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:32,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4619,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:32,221 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 522 times [2021-07-09 17:42:32,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:32,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125617506] [2021-07-09 17:42:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:32,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:32,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125617506] [2021-07-09 17:42:32,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125617506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:32,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080659295] [2021-07-09 17:42:32,312 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 [2021-07-09 17:42:32,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080659295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:32,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:32,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33842790] [2021-07-09 17:42:32,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:32,617 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) [2021-07-09 17:42:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:32,798 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-07-09 17:42:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:32,799 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 [2021-07-09 17:42:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:32,799 INFO L225 Difference]: With dead ends: 547 [2021-07-09 17:42:32,800 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:42:32,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:42:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-07-09 17:42:32,803 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) [2021-07-09 17:42:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-07-09 17:42:32,804 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-07-09 17:42:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:32,804 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-07-09 17:42:32,804 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) [2021-07-09 17:42:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-07-09 17:42:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:32,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:32,804 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:33,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:33,005 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 523 times [2021-07-09 17:42:33,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:33,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908074145] [2021-07-09 17:42:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:33,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908074145] [2021-07-09 17:42:33,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908074145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291997039] [2021-07-09 17:42:33,073 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 [2021-07-09 17:42:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291997039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:33,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:33,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95428936] [2021-07-09 17:42:33,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:33,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:33,319 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) [2021-07-09 17:42:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:33,594 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-07-09 17:42:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:33,594 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 [2021-07-09 17:42:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:33,595 INFO L225 Difference]: With dead ends: 572 [2021-07-09 17:42:33,595 INFO L226 Difference]: Without dead ends: 566 [2021-07-09 17:42:33,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-09 17:42:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-07-09 17:42:33,600 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) [2021-07-09 17:42:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-07-09 17:42:33,601 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-07-09 17:42:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:33,601 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-07-09 17:42:33,601 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) [2021-07-09 17:42:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-07-09 17:42:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:33,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:33,602 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:33,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-07-09 17:42:33,825 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 524 times [2021-07-09 17:42:33,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:33,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883266916] [2021-07-09 17:42:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:33,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:33,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883266916] [2021-07-09 17:42:33,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883266916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:33,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010662012] [2021-07-09 17:42:33,907 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 [2021-07-09 17:42:34,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010662012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:34,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:34,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792987604] [2021-07-09 17:42:34,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:34,187 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) [2021-07-09 17:42:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:34,466 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-07-09 17:42:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:34,466 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 [2021-07-09 17:42:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:34,467 INFO L225 Difference]: With dead ends: 578 [2021-07-09 17:42:34,467 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:42:34,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:42:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-07-09 17:42:34,471 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) [2021-07-09 17:42:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-07-09 17:42:34,471 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-07-09 17:42:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:34,471 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-07-09 17:42:34,472 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) [2021-07-09 17:42:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-07-09 17:42:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:34,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:34,472 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:34,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:34,672 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 525 times [2021-07-09 17:42:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962880602] [2021-07-09 17:42:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:34,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:34,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962880602] [2021-07-09 17:42:34,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962880602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:34,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725583568] [2021-07-09 17:42:34,742 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 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 [2021-07-09 17:42:34,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725583568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:35,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:35,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:35,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237602793] [2021-07-09 17:42:35,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:35,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:35,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:35,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:35,010 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) [2021-07-09 17:42:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:35,209 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-07-09 17:42:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:35,210 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 [2021-07-09 17:42:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:35,210 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:42:35,211 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:42:35,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:42:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-07-09 17:42:35,214 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) [2021-07-09 17:42:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-07-09 17:42:35,215 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-07-09 17:42:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-07-09 17:42:35,215 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) [2021-07-09 17:42:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-07-09 17:42:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:35,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:35,215 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:35,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-07-09 17:42:35,416 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 526 times [2021-07-09 17:42:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:35,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030858949] [2021-07-09 17:42:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:35,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:35,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030858949] [2021-07-09 17:42:35,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030858949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:35,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971033132] [2021-07-09 17:42:35,488 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 [2021-07-09 17:42:35,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971033132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:35,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:35,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:35,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559905094] [2021-07-09 17:42:35,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:35,731 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) [2021-07-09 17:42:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:35,927 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-07-09 17:42:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:35,928 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 [2021-07-09 17:42:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:35,929 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:42:35,929 INFO L226 Difference]: Without dead ends: 496 [2021-07-09 17:42:35,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-09 17:42:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-07-09 17:42:35,932 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) [2021-07-09 17:42:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-07-09 17:42:35,933 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-07-09 17:42:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:35,933 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-07-09 17:42:35,933 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) [2021-07-09 17:42:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-07-09 17:42:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:35,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:35,933 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:36,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:36,134 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 527 times [2021-07-09 17:42:36,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:36,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783725705] [2021-07-09 17:42:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:36,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783725705] [2021-07-09 17:42:36,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783725705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:36,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931593516] [2021-07-09 17:42:36,200 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 [2021-07-09 17:42:36,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:36,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931593516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:36,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:36,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:36,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221952921] [2021-07-09 17:42:36,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:36,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:36,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:36,440 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) [2021-07-09 17:42:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:36,644 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-07-09 17:42:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:36,644 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 [2021-07-09 17:42:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:36,645 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:42:36,645 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:42:36,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:42:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-07-09 17:42:36,648 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) [2021-07-09 17:42:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-07-09 17:42:36,648 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-07-09 17:42:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:36,648 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-07-09 17:42:36,649 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) [2021-07-09 17:42:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-07-09 17:42:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:36,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:36,649 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:36,850 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 528 times [2021-07-09 17:42:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:36,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070874521] [2021-07-09 17:42:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:36,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:36,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070874521] [2021-07-09 17:42:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070874521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:36,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399666997] [2021-07-09 17:42:36,913 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 [2021-07-09 17:42:37,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:37,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399666997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:37,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:37,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781078147] [2021-07-09 17:42:37,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:37,176 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) [2021-07-09 17:42:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:37,361 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-07-09 17:42:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:37,361 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 [2021-07-09 17:42:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:37,362 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:42:37,362 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 17:42:37,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 17:42:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-07-09 17:42:37,366 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) [2021-07-09 17:42:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-07-09 17:42:37,366 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-07-09 17:42:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:37,366 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-07-09 17:42:37,366 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) [2021-07-09 17:42:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-07-09 17:42:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:37,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:37,367 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:37,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:37,567 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 529 times [2021-07-09 17:42:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:37,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960800394] [2021-07-09 17:42:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:37,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:37,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960800394] [2021-07-09 17:42:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960800394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:37,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143860637] [2021-07-09 17:42:37,633 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 [2021-07-09 17:42:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:37,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:37,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143860637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:37,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:37,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:37,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652076667] [2021-07-09 17:42:37,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:37,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:37,875 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) [2021-07-09 17:42:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:38,116 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-07-09 17:42:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:38,116 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 [2021-07-09 17:42:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:38,117 INFO L225 Difference]: With dead ends: 502 [2021-07-09 17:42:38,117 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:42:38,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:42:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-07-09 17:42:38,120 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) [2021-07-09 17:42:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-07-09 17:42:38,121 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-07-09 17:42:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:38,121 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-07-09 17:42:38,121 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) [2021-07-09 17:42:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-07-09 17:42:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:38,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:38,121 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:38,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:38,322 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:38,322 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 530 times [2021-07-09 17:42:38,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:38,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910801322] [2021-07-09 17:42:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:38,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910801322] [2021-07-09 17:42:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910801322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297536973] [2021-07-09 17:42:38,388 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 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 [2021-07-09 17:42:38,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297536973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:38,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:38,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531877024] [2021-07-09 17:42:38,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:38,649 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) [2021-07-09 17:42:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:38,918 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-07-09 17:42:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:38,918 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 [2021-07-09 17:42:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:38,919 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:42:38,919 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:42:38,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:42:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-07-09 17:42:38,922 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) [2021-07-09 17:42:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:42:38,923 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-09 17:42:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:38,923 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:42:38,923 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) [2021-07-09 17:42:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:42:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:38,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:38,924 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:39,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:39,124 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:39,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 531 times [2021-07-09 17:42:39,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:39,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017900730] [2021-07-09 17:42:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:39,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017900730] [2021-07-09 17:42:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017900730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975141836] [2021-07-09 17:42:39,181 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 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 [2021-07-09 17:42:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:42:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:39,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975141836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:39,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:39,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054926145] [2021-07-09 17:42:39,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:39,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:39,423 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) [2021-07-09 17:42:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:39,602 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-07-09 17:42:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:39,602 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 [2021-07-09 17:42:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:39,602 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:42:39,602 INFO L226 Difference]: Without dead ends: 431 [2021-07-09 17:42:39,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-09 17:42:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-07-09 17:42:39,606 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) [2021-07-09 17:42:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-07-09 17:42:39,606 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-07-09 17:42:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:39,606 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-07-09 17:42:39,606 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) [2021-07-09 17:42:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-07-09 17:42:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:39,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:39,607 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:39,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4706,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:39,807 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 532 times [2021-07-09 17:42:39,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:39,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369051527] [2021-07-09 17:42:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:39,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369051527] [2021-07-09 17:42:39,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369051527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:39,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636620785] [2021-07-09 17:42:39,865 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 [2021-07-09 17:42:39,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636620785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:40,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:40,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705530004] [2021-07-09 17:42:40,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:40,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:40,100 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) [2021-07-09 17:42:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:40,381 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-07-09 17:42:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:40,381 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 [2021-07-09 17:42:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:40,382 INFO L225 Difference]: With dead ends: 468 [2021-07-09 17:42:40,382 INFO L226 Difference]: Without dead ends: 462 [2021-07-09 17:42:40,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-09 17:42:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-07-09 17:42:40,386 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) [2021-07-09 17:42:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-07-09 17:42:40,386 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-07-09 17:42:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:40,386 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-07-09 17:42:40,386 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) [2021-07-09 17:42:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-07-09 17:42:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:40,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:40,387 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:40,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-07-09 17:42:40,587 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 533 times [2021-07-09 17:42:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:40,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605598935] [2021-07-09 17:42:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:40,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605598935] [2021-07-09 17:42:40,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605598935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25901668] [2021-07-09 17:42:40,647 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 [2021-07-09 17:42:40,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:40,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25901668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:40,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:40,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875335150] [2021-07-09 17:42:40,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:40,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:40,916 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) [2021-07-09 17:42:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:41,105 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-07-09 17:42:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:41,105 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 [2021-07-09 17:42:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:41,106 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:42:41,106 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:42:41,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:42:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-07-09 17:42:41,109 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) [2021-07-09 17:42:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-07-09 17:42:41,110 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-07-09 17:42:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:41,110 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-07-09 17:42:41,110 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) [2021-07-09 17:42:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-07-09 17:42:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:41,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:41,110 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:41,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-07-09 17:42:41,311 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 534 times [2021-07-09 17:42:41,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:41,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357034544] [2021-07-09 17:42:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:41,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357034544] [2021-07-09 17:42:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357034544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603693058] [2021-07-09 17:42:41,386 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 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 [2021-07-09 17:42:41,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:41,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603693058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:41,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:41,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:41,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774169752] [2021-07-09 17:42:41,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:41,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:41,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:41,620 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) [2021-07-09 17:42:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:41,824 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-07-09 17:42:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:41,824 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 [2021-07-09 17:42:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:41,825 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:42:41,825 INFO L226 Difference]: Without dead ends: 468 [2021-07-09 17:42:41,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-09 17:42:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-07-09 17:42:41,829 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) [2021-07-09 17:42:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-07-09 17:42:41,829 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-07-09 17:42:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:41,829 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-07-09 17:42:41,829 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) [2021-07-09 17:42:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-07-09 17:42:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:41,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:41,830 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:42,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4724,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:42,030 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 535 times [2021-07-09 17:42:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:42,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433592488] [2021-07-09 17:42:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:42,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433592488] [2021-07-09 17:42:42,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433592488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142021683] [2021-07-09 17:42:42,091 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 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 [2021-07-09 17:42:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:42,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142021683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:42,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:42,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:42,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459388345] [2021-07-09 17:42:42,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:42,316 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) [2021-07-09 17:42:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:42,499 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-07-09 17:42:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:42,499 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 [2021-07-09 17:42:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:42,500 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:42:42,500 INFO L226 Difference]: Without dead ends: 474 [2021-07-09 17:42:42,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-09 17:42:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-07-09 17:42:42,503 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) [2021-07-09 17:42:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-07-09 17:42:42,504 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-07-09 17:42:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:42,504 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-07-09 17:42:42,504 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) [2021-07-09 17:42:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-07-09 17:42:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:42,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:42,504 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:42,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4729 [2021-07-09 17:42:42,705 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 536 times [2021-07-09 17:42:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:42,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389833281] [2021-07-09 17:42:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:42,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389833281] [2021-07-09 17:42:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389833281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118340137] [2021-07-09 17:42:42,766 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 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 [2021-07-09 17:42:42,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118340137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:42,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:42,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961265584] [2021-07-09 17:42:42,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:42,992 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) [2021-07-09 17:42:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:43,146 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-07-09 17:42:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:43,147 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 [2021-07-09 17:42:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:43,147 INFO L225 Difference]: With dead ends: 449 [2021-07-09 17:42:43,147 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:42:43,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:42:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-07-09 17:42:43,150 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) [2021-07-09 17:42:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-09 17:42:43,151 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-09 17:42:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:43,151 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-09 17:42:43,151 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) [2021-07-09 17:42:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-09 17:42:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:43,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:43,151 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:43,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:43,352 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 537 times [2021-07-09 17:42:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:43,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152100284] [2021-07-09 17:42:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:43,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152100284] [2021-07-09 17:42:43,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152100284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388452213] [2021-07-09 17:42:43,426 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 [2021-07-09 17:42:43,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388452213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:43,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:43,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:43,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604184214] [2021-07-09 17:42:43,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:43,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:43,690 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) [2021-07-09 17:42:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:44,039 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-07-09 17:42:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:44,039 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 [2021-07-09 17:42:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:44,040 INFO L225 Difference]: With dead ends: 662 [2021-07-09 17:42:44,040 INFO L226 Difference]: Without dead ends: 662 [2021-07-09 17:42:44,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-09 17:42:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-07-09 17:42:44,044 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) [2021-07-09 17:42:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-07-09 17:42:44,045 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-07-09 17:42:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:44,045 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-07-09 17:42:44,045 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) [2021-07-09 17:42:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-07-09 17:42:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:44,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:44,045 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:44,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4738,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:44,246 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:44,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 538 times [2021-07-09 17:42:44,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:44,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798266467] [2021-07-09 17:42:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:44,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:44,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798266467] [2021-07-09 17:42:44,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798266467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:44,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916081159] [2021-07-09 17:42:44,315 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 [2021-07-09 17:42:44,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:44,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:44,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:44,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916081159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:44,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:44,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:44,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926597893] [2021-07-09 17:42:44,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:44,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:44,578 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) [2021-07-09 17:42:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:44,826 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-07-09 17:42:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:44,826 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 [2021-07-09 17:42:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:44,827 INFO L225 Difference]: With dead ends: 616 [2021-07-09 17:42:44,827 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 17:42:44,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 17:42:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-07-09 17:42:44,831 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) [2021-07-09 17:42:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-07-09 17:42:44,831 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-07-09 17:42:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:44,831 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-07-09 17:42:44,831 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) [2021-07-09 17:42:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-07-09 17:42:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:44,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:44,832 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:45,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4747 [2021-07-09 17:42:45,032 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 539 times [2021-07-09 17:42:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310735315] [2021-07-09 17:42:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:45,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:45,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310735315] [2021-07-09 17:42:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310735315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:45,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285276580] [2021-07-09 17:42:45,111 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 [2021-07-09 17:42:45,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285276580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:45,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:45,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:45,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704043588] [2021-07-09 17:42:45,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:45,374 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) [2021-07-09 17:42:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:45,631 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-07-09 17:42:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:45,631 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 [2021-07-09 17:42:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:45,632 INFO L225 Difference]: With dead ends: 668 [2021-07-09 17:42:45,632 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 17:42:45,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 17:42:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-07-09 17:42:45,636 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) [2021-07-09 17:42:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-07-09 17:42:45,637 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-07-09 17:42:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:45,637 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-07-09 17:42:45,637 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) [2021-07-09 17:42:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-07-09 17:42:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:45,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:45,637 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:45,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:45,838 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 540 times [2021-07-09 17:42:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:45,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303843781] [2021-07-09 17:42:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:45,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303843781] [2021-07-09 17:42:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303843781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480860673] [2021-07-09 17:42:45,910 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 [2021-07-09 17:42:46,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:46,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480860673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:46,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:46,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377318073] [2021-07-09 17:42:46,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:46,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:46,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:46,178 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) [2021-07-09 17:42:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:46,463 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-07-09 17:42:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:46,463 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 [2021-07-09 17:42:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:46,464 INFO L225 Difference]: With dead ends: 631 [2021-07-09 17:42:46,464 INFO L226 Difference]: Without dead ends: 631 [2021-07-09 17:42:46,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-09 17:42:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-07-09 17:42:46,468 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) [2021-07-09 17:42:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-07-09 17:42:46,469 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-07-09 17:42:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:46,469 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-07-09 17:42:46,469 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) [2021-07-09 17:42:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-07-09 17:42:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:46,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:46,469 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:46,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-07-09 17:42:46,670 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 541 times [2021-07-09 17:42:46,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:46,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868982003] [2021-07-09 17:42:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:46,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868982003] [2021-07-09 17:42:46,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868982003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049268436] [2021-07-09 17:42:46,739 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 [2021-07-09 17:42:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049268436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702382510] [2021-07-09 17:42:46,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:46,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:46,980 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) [2021-07-09 17:42:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:47,272 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-07-09 17:42:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:47,272 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 [2021-07-09 17:42:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:47,273 INFO L225 Difference]: With dead ends: 656 [2021-07-09 17:42:47,273 INFO L226 Difference]: Without dead ends: 650 [2021-07-09 17:42:47,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-09 17:42:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-07-09 17:42:47,277 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) [2021-07-09 17:42:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-07-09 17:42:47,278 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-07-09 17:42:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:47,278 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-07-09 17:42:47,278 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) [2021-07-09 17:42:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-07-09 17:42:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:47,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:47,279 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:47,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:47,479 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 542 times [2021-07-09 17:42:47,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:47,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881860390] [2021-07-09 17:42:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:47,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:47,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881860390] [2021-07-09 17:42:47,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881860390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:47,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294958108] [2021-07-09 17:42:47,551 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 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 [2021-07-09 17:42:47,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:47,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:47,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294958108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:47,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:47,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:47,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495127149] [2021-07-09 17:42:47,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:47,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:47,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:47,796 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) [2021-07-09 17:42:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:48,160 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-07-09 17:42:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:48,160 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 [2021-07-09 17:42:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:48,161 INFO L225 Difference]: With dead ends: 662 [2021-07-09 17:42:48,161 INFO L226 Difference]: Without dead ends: 662 [2021-07-09 17:42:48,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-09 17:42:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-07-09 17:42:48,166 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) [2021-07-09 17:42:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-09 17:42:48,166 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-09 17:42:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:48,166 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-09 17:42:48,166 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) [2021-07-09 17:42:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-09 17:42:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:48,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:48,167 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:48,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4789 [2021-07-09 17:42:48,367 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 543 times [2021-07-09 17:42:48,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:48,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41545595] [2021-07-09 17:42:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:48,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:48,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41545595] [2021-07-09 17:42:48,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41545595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:48,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745184095] [2021-07-09 17:42:48,446 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 [2021-07-09 17:42:48,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:48,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:48,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745184095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:48,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:48,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:48,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766738556] [2021-07-09 17:42:48,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:48,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:48,690 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) [2021-07-09 17:42:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:48,952 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-07-09 17:42:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:48,952 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 [2021-07-09 17:42:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:48,953 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:42:48,953 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 17:42:48,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 17:42:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-07-09 17:42:48,957 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) [2021-07-09 17:42:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-07-09 17:42:48,958 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-07-09 17:42:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:48,958 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-07-09 17:42:48,958 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) [2021-07-09 17:42:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-07-09 17:42:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:48,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:48,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:49,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4802,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:49,159 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 544 times [2021-07-09 17:42:49,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:49,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509148635] [2021-07-09 17:42:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:49,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509148635] [2021-07-09 17:42:49,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509148635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654124907] [2021-07-09 17:42:49,231 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 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 [2021-07-09 17:42:49,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:49,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654124907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:49,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:49,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:49,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047563719] [2021-07-09 17:42:49,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:49,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:49,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:49,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:49,508 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) [2021-07-09 17:42:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:49,761 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-07-09 17:42:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:49,761 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 [2021-07-09 17:42:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:49,762 INFO L225 Difference]: With dead ends: 601 [2021-07-09 17:42:49,762 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 17:42:49,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 17:42:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-07-09 17:42:49,766 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) [2021-07-09 17:42:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-07-09 17:42:49,767 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-07-09 17:42:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:49,767 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-07-09 17:42:49,767 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) [2021-07-09 17:42:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-07-09 17:42:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:49,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:49,767 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:49,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4809 [2021-07-09 17:42:49,968 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 545 times [2021-07-09 17:42:49,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:49,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030347553] [2021-07-09 17:42:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:50,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:50,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030347553] [2021-07-09 17:42:50,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030347553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:50,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024619777] [2021-07-09 17:42:50,039 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 [2021-07-09 17:42:50,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:50,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024619777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:50,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:50,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:50,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189150417] [2021-07-09 17:42:50,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:50,281 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) [2021-07-09 17:42:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:50,529 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-07-09 17:42:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:50,529 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 [2021-07-09 17:42:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:50,530 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:42:50,530 INFO L226 Difference]: Without dead ends: 556 [2021-07-09 17:42:50,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-09 17:42:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-07-09 17:42:50,534 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) [2021-07-09 17:42:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-07-09 17:42:50,535 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-07-09 17:42:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:50,535 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-07-09 17:42:50,535 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) [2021-07-09 17:42:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-07-09 17:42:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:50,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:50,535 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:50,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-07-09 17:42:50,736 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 546 times [2021-07-09 17:42:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131452103] [2021-07-09 17:42:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:50,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:50,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131452103] [2021-07-09 17:42:50,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131452103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399265610] [2021-07-09 17:42:50,803 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 [2021-07-09 17:42:50,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:51,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399265610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:51,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:51,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:51,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331964826] [2021-07-09 17:42:51,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:51,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:51,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:51,107 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) [2021-07-09 17:42:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:51,426 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-07-09 17:42:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:51,426 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 [2021-07-09 17:42:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:51,427 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:42:51,427 INFO L226 Difference]: Without dead ends: 589 [2021-07-09 17:42:51,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-09 17:42:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-07-09 17:42:51,431 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) [2021-07-09 17:42:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-07-09 17:42:51,431 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-07-09 17:42:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:51,431 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-07-09 17:42:51,431 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) [2021-07-09 17:42:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-07-09 17:42:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:51,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:51,432 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:51,632 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 547 times [2021-07-09 17:42:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526764222] [2021-07-09 17:42:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:51,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:51,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526764222] [2021-07-09 17:42:51,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526764222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:51,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37279048] [2021-07-09 17:42:51,701 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 [2021-07-09 17:42:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37279048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:51,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:51,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:51,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707244646] [2021-07-09 17:42:51,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:51,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:51,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:51,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:51,964 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) [2021-07-09 17:42:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:52,227 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-07-09 17:42:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:52,227 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 [2021-07-09 17:42:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:52,228 INFO L225 Difference]: With dead ends: 601 [2021-07-09 17:42:52,228 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 17:42:52,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 17:42:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-07-09 17:42:52,232 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) [2021-07-09 17:42:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-07-09 17:42:52,232 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-07-09 17:42:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:52,233 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-07-09 17:42:52,233 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) [2021-07-09 17:42:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-07-09 17:42:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:52,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:52,233 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:52,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4834 [2021-07-09 17:42:52,445 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:52,446 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 548 times [2021-07-09 17:42:52,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:52,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714561571] [2021-07-09 17:42:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:52,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:52,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714561571] [2021-07-09 17:42:52,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714561571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:52,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573043961] [2021-07-09 17:42:52,517 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 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 [2021-07-09 17:42:52,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:52,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573043961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:52,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:52,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633565976] [2021-07-09 17:42:52,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:52,756 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) [2021-07-09 17:42:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:53,025 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-07-09 17:42:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:53,025 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 [2021-07-09 17:42:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:53,026 INFO L225 Difference]: With dead ends: 576 [2021-07-09 17:42:53,026 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:42:53,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:42:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-07-09 17:42:53,030 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) [2021-07-09 17:42:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-07-09 17:42:53,031 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-07-09 17:42:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:53,031 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-07-09 17:42:53,031 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) [2021-07-09 17:42:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-07-09 17:42:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:53,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:53,031 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:53,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:53,232 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 549 times [2021-07-09 17:42:53,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:53,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511558847] [2021-07-09 17:42:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:53,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:53,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511558847] [2021-07-09 17:42:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511558847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:53,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320508701] [2021-07-09 17:42:53,300 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 [2021-07-09 17:42:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:53,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320508701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:53,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:53,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:53,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571642671] [2021-07-09 17:42:53,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:53,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:53,539 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) [2021-07-09 17:42:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:53,798 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-07-09 17:42:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:53,798 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 [2021-07-09 17:42:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:53,799 INFO L225 Difference]: With dead ends: 600 [2021-07-09 17:42:53,799 INFO L226 Difference]: Without dead ends: 600 [2021-07-09 17:42:53,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-09 17:42:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-07-09 17:42:53,803 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) [2021-07-09 17:42:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-07-09 17:42:53,803 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-07-09 17:42:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:53,803 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-07-09 17:42:53,803 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) [2021-07-09 17:42:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-07-09 17:42:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:53,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:53,804 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:54,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4847 [2021-07-09 17:42:54,004 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 550 times [2021-07-09 17:42:54,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:54,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954626088] [2021-07-09 17:42:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:54,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:54,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954626088] [2021-07-09 17:42:54,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954626088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:54,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195652501] [2021-07-09 17:42:54,073 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 [2021-07-09 17:42:54,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:54,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195652501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:54,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:54,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661950863] [2021-07-09 17:42:54,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:54,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:54,335 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) [2021-07-09 17:42:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:54,584 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-07-09 17:42:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:54,584 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 [2021-07-09 17:42:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:54,585 INFO L225 Difference]: With dead ends: 602 [2021-07-09 17:42:54,585 INFO L226 Difference]: Without dead ends: 602 [2021-07-09 17:42:54,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-09 17:42:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-07-09 17:42:54,589 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) [2021-07-09 17:42:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-07-09 17:42:54,589 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-07-09 17:42:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:54,590 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-07-09 17:42:54,590 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) [2021-07-09 17:42:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-07-09 17:42:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:54,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:54,590 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:54,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:54,791 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 551 times [2021-07-09 17:42:54,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:54,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116683268] [2021-07-09 17:42:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:54,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:54,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116683268] [2021-07-09 17:42:54,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116683268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:54,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824350438] [2021-07-09 17:42:54,859 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 [2021-07-09 17:42:54,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824350438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:55,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:55,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:42:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359478816] [2021-07-09 17:42:55,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:55,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:55,103 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) [2021-07-09 17:42:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:55,353 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-07-09 17:42:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:55,353 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 [2021-07-09 17:42:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:55,354 INFO L225 Difference]: With dead ends: 547 [2021-07-09 17:42:55,354 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:42:55,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:42:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-07-09 17:42:55,357 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) [2021-07-09 17:42:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-07-09 17:42:55,358 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-07-09 17:42:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:55,358 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-07-09 17:42:55,358 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) [2021-07-09 17:42:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-07-09 17:42:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:55,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:55,359 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:55,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:55,559 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 552 times [2021-07-09 17:42:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:55,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842839144] [2021-07-09 17:42:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842839144] [2021-07-09 17:42:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842839144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596058381] [2021-07-09 17:42:55,619 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 [2021-07-09 17:42:55,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:42:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596058381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:55,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:55,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:55,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059334540] [2021-07-09 17:42:55,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:55,840 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) [2021-07-09 17:42:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:56,088 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-07-09 17:42:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:56,089 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 [2021-07-09 17:42:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:56,090 INFO L225 Difference]: With dead ends: 570 [2021-07-09 17:42:56,090 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 17:42:56,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 17:42:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-07-09 17:42:56,093 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) [2021-07-09 17:42:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-09 17:42:56,094 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-07-09 17:42:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:56,094 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-09 17:42:56,094 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) [2021-07-09 17:42:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-09 17:42:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:56,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:56,094 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:56,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:56,295 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 553 times [2021-07-09 17:42:56,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:56,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224700562] [2021-07-09 17:42:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:56,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:56,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224700562] [2021-07-09 17:42:56,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224700562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:56,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331706058] [2021-07-09 17:42:56,365 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 [2021-07-09 17:42:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:56,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331706058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:56,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:56,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:56,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746752813] [2021-07-09 17:42:56,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:56,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:56,609 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) [2021-07-09 17:42:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:56,893 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-07-09 17:42:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:56,893 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 [2021-07-09 17:42:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:56,894 INFO L225 Difference]: With dead ends: 635 [2021-07-09 17:42:56,894 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 17:42:56,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 17:42:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-07-09 17:42:56,898 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) [2021-07-09 17:42:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-07-09 17:42:56,899 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-07-09 17:42:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:56,899 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-07-09 17:42:56,899 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) [2021-07-09 17:42:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-07-09 17:42:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:56,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:56,899 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:57,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4872,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:57,100 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 554 times [2021-07-09 17:42:57,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:57,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733501636] [2021-07-09 17:42:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:57,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733501636] [2021-07-09 17:42:57,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733501636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750559589] [2021-07-09 17:42:57,163 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 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 [2021-07-09 17:42:57,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:57,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750559589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:57,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:57,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:57,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461774866] [2021-07-09 17:42:57,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:57,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:57,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:57,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:57,394 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) [2021-07-09 17:42:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:57,735 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-07-09 17:42:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:57,736 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 [2021-07-09 17:42:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:57,737 INFO L225 Difference]: With dead ends: 641 [2021-07-09 17:42:57,737 INFO L226 Difference]: Without dead ends: 641 [2021-07-09 17:42:57,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-07-09 17:42:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-07-09 17:42:57,741 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) [2021-07-09 17:42:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-07-09 17:42:57,741 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-07-09 17:42:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:57,741 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-07-09 17:42:57,741 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) [2021-07-09 17:42:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-07-09 17:42:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:57,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:57,742 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:57,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4880,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:57,942 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 555 times [2021-07-09 17:42:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:57,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057748725] [2021-07-09 17:42:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:58,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057748725] [2021-07-09 17:42:58,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057748725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055528734] [2021-07-09 17:42:58,013 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 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 [2021-07-09 17:42:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055528734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:58,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:42:58,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944877468] [2021-07-09 17:42:58,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:42:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:42:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:42:58,236 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) [2021-07-09 17:42:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:58,526 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-07-09 17:42:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:58,526 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 [2021-07-09 17:42:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:58,527 INFO L225 Difference]: With dead ends: 624 [2021-07-09 17:42:58,527 INFO L226 Difference]: Without dead ends: 624 [2021-07-09 17:42:58,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-09 17:42:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-07-09 17:42:58,531 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) [2021-07-09 17:42:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-07-09 17:42:58,532 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-07-09 17:42:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:58,532 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-07-09 17:42:58,532 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) [2021-07-09 17:42:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-07-09 17:42:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:58,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:58,532 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:58,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:58,733 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 556 times [2021-07-09 17:42:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:58,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138195880] [2021-07-09 17:42:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:58,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138195880] [2021-07-09 17:42:58,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138195880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377204837] [2021-07-09 17:42:58,791 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 [2021-07-09 17:42:58,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:59,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377204837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:59,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:59,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:59,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483628668] [2021-07-09 17:42:59,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:59,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:59,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:59,017 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) [2021-07-09 17:42:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:59,300 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-07-09 17:42:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:42:59,301 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 [2021-07-09 17:42:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:59,301 INFO L225 Difference]: With dead ends: 649 [2021-07-09 17:42:59,302 INFO L226 Difference]: Without dead ends: 649 [2021-07-09 17:42:59,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-09 17:42:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-07-09 17:42:59,306 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) [2021-07-09 17:42:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-07-09 17:42:59,306 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-07-09 17:42:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:59,306 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-07-09 17:42:59,306 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) [2021-07-09 17:42:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-07-09 17:42:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:59,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:59,307 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:59,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4894,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:59,507 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:59,508 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 557 times [2021-07-09 17:42:59,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:59,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31658339] [2021-07-09 17:42:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:59,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31658339] [2021-07-09 17:42:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31658339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433970018] [2021-07-09 17:42:59,560 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 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 [2021-07-09 17:42:59,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:59,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:42:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433970018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:59,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:59,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:42:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086082223] [2021-07-09 17:42:59,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:42:59,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:42:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:42:59,788 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) [2021-07-09 17:43:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:00,002 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-07-09 17:43:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:00,002 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 [2021-07-09 17:43:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:00,003 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:43:00,003 INFO L226 Difference]: Without dead ends: 434 [2021-07-09 17:43:00,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-09 17:43:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-07-09 17:43:00,006 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) [2021-07-09 17:43:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-07-09 17:43:00,007 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-07-09 17:43:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:00,007 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-07-09 17:43:00,007 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) [2021-07-09 17:43:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-07-09 17:43:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:00,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:00,008 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:00,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:00,208 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 558 times [2021-07-09 17:43:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:00,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265900110] [2021-07-09 17:43:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:00,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265900110] [2021-07-09 17:43:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265900110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772042570] [2021-07-09 17:43:00,261 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 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 [2021-07-09 17:43:00,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:43:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:00,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772042570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:00,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:00,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959685004] [2021-07-09 17:43:00,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:00,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:00,478 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) [2021-07-09 17:43:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:00,755 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-07-09 17:43:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:43:00,756 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 [2021-07-09 17:43:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:00,756 INFO L225 Difference]: With dead ends: 471 [2021-07-09 17:43:00,756 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:43:00,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:43:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-07-09 17:43:00,761 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) [2021-07-09 17:43:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-09 17:43:00,762 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-07-09 17:43:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:00,762 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-09 17:43:00,762 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) [2021-07-09 17:43:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-09 17:43:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:00,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:00,763 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:00,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4907 [2021-07-09 17:43:00,977 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 559 times [2021-07-09 17:43:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:00,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361393567] [2021-07-09 17:43:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361393567] [2021-07-09 17:43:01,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361393567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112657312] [2021-07-09 17:43:01,031 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 [2021-07-09 17:43:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112657312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:01,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:01,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593596848] [2021-07-09 17:43:01,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:01,276 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) [2021-07-09 17:43:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:01,468 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-07-09 17:43:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:01,468 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 [2021-07-09 17:43:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:01,469 INFO L225 Difference]: With dead ends: 442 [2021-07-09 17:43:01,469 INFO L226 Difference]: Without dead ends: 442 [2021-07-09 17:43:01,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-09 17:43:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-07-09 17:43:01,472 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) [2021-07-09 17:43:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-07-09 17:43:01,472 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-07-09 17:43:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:01,472 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-07-09 17:43:01,472 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) [2021-07-09 17:43:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-07-09 17:43:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:01,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:01,473 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:01,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4912 [2021-07-09 17:43:01,673 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:01,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 560 times [2021-07-09 17:43:01,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:01,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847966200] [2021-07-09 17:43:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847966200] [2021-07-09 17:43:01,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847966200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196773718] [2021-07-09 17:43:01,726 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 [2021-07-09 17:43:01,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196773718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:01,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:01,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658918506] [2021-07-09 17:43:01,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:01,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:01,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:01,939 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) [2021-07-09 17:43:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:02,135 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-07-09 17:43:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:02,135 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 [2021-07-09 17:43:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:02,136 INFO L225 Difference]: With dead ends: 477 [2021-07-09 17:43:02,136 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:43:02,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:43:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-07-09 17:43:02,139 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) [2021-07-09 17:43:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-07-09 17:43:02,140 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-07-09 17:43:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:02,140 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-07-09 17:43:02,140 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) [2021-07-09 17:43:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-07-09 17:43:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:02,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:02,140 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:02,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-07-09 17:43:02,341 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 561 times [2021-07-09 17:43:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:02,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306677646] [2021-07-09 17:43:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:02,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306677646] [2021-07-09 17:43:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306677646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970825654] [2021-07-09 17:43:02,396 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 [2021-07-09 17:43:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:02,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970825654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:02,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:02,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105624271] [2021-07-09 17:43:02,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:02,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:02,601 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) [2021-07-09 17:43:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:02,788 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-07-09 17:43:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:43:02,789 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 [2021-07-09 17:43:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:02,789 INFO L225 Difference]: With dead ends: 477 [2021-07-09 17:43:02,789 INFO L226 Difference]: Without dead ends: 477 [2021-07-09 17:43:02,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-09 17:43:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-07-09 17:43:02,793 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) [2021-07-09 17:43:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-07-09 17:43:02,793 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-07-09 17:43:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:02,794 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-07-09 17:43:02,794 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) [2021-07-09 17:43:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-07-09 17:43:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:02,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:02,794 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:02,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-07-09 17:43:02,995 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 562 times [2021-07-09 17:43:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:02,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253969166] [2021-07-09 17:43:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:03,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253969166] [2021-07-09 17:43:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253969166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476596115] [2021-07-09 17:43:03,050 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 [2021-07-09 17:43:03,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:03,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476596115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:03,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852498346] [2021-07-09 17:43:03,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:03,257 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) [2021-07-09 17:43:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:03,432 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-07-09 17:43:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:03,432 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 [2021-07-09 17:43:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:03,433 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:43:03,433 INFO L226 Difference]: Without dead ends: 452 [2021-07-09 17:43:03,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-09 17:43:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-07-09 17:43:03,436 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) [2021-07-09 17:43:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-07-09 17:43:03,437 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-07-09 17:43:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:03,437 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-07-09 17:43:03,437 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) [2021-07-09 17:43:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-07-09 17:43:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:03,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:03,437 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:03,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4927,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:03,638 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:03,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:03,638 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 563 times [2021-07-09 17:43:03,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:03,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594898342] [2021-07-09 17:43:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:03,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594898342] [2021-07-09 17:43:03,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594898342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190821646] [2021-07-09 17:43:03,694 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 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 [2021-07-09 17:43:03,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190821646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:03,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408169121] [2021-07-09 17:43:03,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:03,898 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) [2021-07-09 17:43:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:04,113 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-07-09 17:43:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:04,113 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 [2021-07-09 17:43:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:04,114 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:43:04,114 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:43:04,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:43:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-07-09 17:43:04,118 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) [2021-07-09 17:43:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-07-09 17:43:04,118 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-07-09 17:43:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:04,118 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-07-09 17:43:04,118 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) [2021-07-09 17:43:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-07-09 17:43:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:04,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:04,119 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:04,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-07-09 17:43:04,319 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 564 times [2021-07-09 17:43:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:04,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302757426] [2021-07-09 17:43:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:04,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302757426] [2021-07-09 17:43:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302757426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388210777] [2021-07-09 17:43:04,382 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 [2021-07-09 17:43:04,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:04,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388210777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:04,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:04,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:04,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220658590] [2021-07-09 17:43:04,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:04,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:04,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:04,589 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) [2021-07-09 17:43:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:04,833 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-07-09 17:43:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:43:04,833 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 [2021-07-09 17:43:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:04,834 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:43:04,834 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:43:04,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:43:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-07-09 17:43:04,838 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) [2021-07-09 17:43:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-07-09 17:43:04,838 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-07-09 17:43:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:04,838 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-07-09 17:43:04,838 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) [2021-07-09 17:43:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-07-09 17:43:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:04,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:04,839 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:05,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4934,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:05,039 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 565 times [2021-07-09 17:43:05,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:05,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077570463] [2021-07-09 17:43:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077570463] [2021-07-09 17:43:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077570463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385011347] [2021-07-09 17:43:05,095 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 [2021-07-09 17:43:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:05,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385011347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:05,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:05,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252543096] [2021-07-09 17:43:05,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:05,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:05,295 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) [2021-07-09 17:43:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:05,490 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-07-09 17:43:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:05,490 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 [2021-07-09 17:43:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:05,491 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:43:05,491 INFO L226 Difference]: Without dead ends: 525 [2021-07-09 17:43:05,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-09 17:43:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-07-09 17:43:05,495 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) [2021-07-09 17:43:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-07-09 17:43:05,495 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-07-09 17:43:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:05,495 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-07-09 17:43:05,495 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) [2021-07-09 17:43:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-07-09 17:43:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:05,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:05,496 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:05,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4939 [2021-07-09 17:43:05,696 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 566 times [2021-07-09 17:43:05,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:05,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535450382] [2021-07-09 17:43:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:05,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535450382] [2021-07-09 17:43:05,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535450382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132907251] [2021-07-09 17:43:05,749 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 [2021-07-09 17:43:05,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:05,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132907251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:05,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763757131] [2021-07-09 17:43:05,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:05,935 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) [2021-07-09 17:43:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:06,114 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-07-09 17:43:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:06,114 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 [2021-07-09 17:43:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:06,115 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:43:06,115 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 17:43:06,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 17:43:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-07-09 17:43:06,119 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) [2021-07-09 17:43:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-07-09 17:43:06,119 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-07-09 17:43:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:06,119 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-07-09 17:43:06,119 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) [2021-07-09 17:43:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-07-09 17:43:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:06,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:06,120 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:06,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4942 [2021-07-09 17:43:06,320 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 567 times [2021-07-09 17:43:06,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:06,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090283021] [2021-07-09 17:43:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:06,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090283021] [2021-07-09 17:43:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090283021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450800003] [2021-07-09 17:43:06,366 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 [2021-07-09 17:43:06,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:43:06,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:06,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:06,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:06,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450800003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:06,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:06,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817372650] [2021-07-09 17:43:06,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:06,558 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) [2021-07-09 17:43:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:06,821 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-07-09 17:43:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:06,822 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 [2021-07-09 17:43:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:06,822 INFO L225 Difference]: With dead ends: 491 [2021-07-09 17:43:06,822 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 17:43:06,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 17:43:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-07-09 17:43:06,826 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) [2021-07-09 17:43:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-09 17:43:06,826 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-09 17:43:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:06,826 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-09 17:43:06,826 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) [2021-07-09 17:43:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-09 17:43:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:06,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:06,827 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:07,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:07,027 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 568 times [2021-07-09 17:43:07,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:07,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128072298] [2021-07-09 17:43:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:07,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128072298] [2021-07-09 17:43:07,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128072298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:07,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405296780] [2021-07-09 17:43:07,077 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 [2021-07-09 17:43:07,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:07,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405296780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903283448] [2021-07-09 17:43:07,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:07,298 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) [2021-07-09 17:43:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:07,587 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-07-09 17:43:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:07,588 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 [2021-07-09 17:43:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:07,588 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:43:07,588 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:43:07,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:43:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-07-09 17:43:07,592 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) [2021-07-09 17:43:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-09 17:43:07,592 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-09 17:43:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:07,593 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-09 17:43:07,593 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) [2021-07-09 17:43:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-09 17:43:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:07,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:07,593 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:07,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4951 [2021-07-09 17:43:07,793 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 569 times [2021-07-09 17:43:07,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:07,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290486556] [2021-07-09 17:43:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:07,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:07,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290486556] [2021-07-09 17:43:07,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290486556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:07,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503197489] [2021-07-09 17:43:07,843 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 [2021-07-09 17:43:07,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:07,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503197489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:08,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:08,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:08,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073480157] [2021-07-09 17:43:08,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:08,071 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) [2021-07-09 17:43:08,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:08,514 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-07-09 17:43:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:43:08,514 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 [2021-07-09 17:43:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:08,515 INFO L225 Difference]: With dead ends: 512 [2021-07-09 17:43:08,515 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:43:08,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:43:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-07-09 17:43:08,519 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) [2021-07-09 17:43:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-09 17:43:08,519 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-09 17:43:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:08,519 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-09 17:43:08,520 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) [2021-07-09 17:43:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-09 17:43:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:08,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:08,520 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:08,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-07-09 17:43:08,720 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 570 times [2021-07-09 17:43:08,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:08,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101279626] [2021-07-09 17:43:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:08,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:08,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101279626] [2021-07-09 17:43:08,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101279626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:08,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513397216] [2021-07-09 17:43:08,773 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 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 [2021-07-09 17:43:08,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:08,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513397216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:09,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:09,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:43:09,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921036492] [2021-07-09 17:43:09,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:43:09,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:09,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:43:09,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:43:09,009 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) [2021-07-09 17:43:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:09,316 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-07-09 17:43:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:09,316 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 [2021-07-09 17:43:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:09,317 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:43:09,317 INFO L226 Difference]: Without dead ends: 483 [2021-07-09 17:43:09,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-09 17:43:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-07-09 17:43:09,321 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) [2021-07-09 17:43:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-07-09 17:43:09,321 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-07-09 17:43:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:09,321 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-07-09 17:43:09,321 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) [2021-07-09 17:43:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-07-09 17:43:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:09,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:09,322 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:09,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:09,522 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 571 times [2021-07-09 17:43:09,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:09,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890810153] [2021-07-09 17:43:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:09,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:09,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890810153] [2021-07-09 17:43:09,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890810153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:09,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300570981] [2021-07-09 17:43:09,569 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 [2021-07-09 17:43:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:09,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300570981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:09,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:09,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:09,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705846867] [2021-07-09 17:43:09,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:09,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:09,777 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) [2021-07-09 17:43:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:10,010 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-07-09 17:43:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:10,010 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 [2021-07-09 17:43:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:10,011 INFO L225 Difference]: With dead ends: 432 [2021-07-09 17:43:10,011 INFO L226 Difference]: Without dead ends: 420 [2021-07-09 17:43:10,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-09 17:43:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-07-09 17:43:10,014 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) [2021-07-09 17:43:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-09 17:43:10,015 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-09 17:43:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:10,015 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-09 17:43:10,015 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) [2021-07-09 17:43:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-09 17:43:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:10,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:10,015 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:10,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4967 [2021-07-09 17:43:10,216 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:10,216 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 572 times [2021-07-09 17:43:10,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:10,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565355015] [2021-07-09 17:43:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:10,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:10,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565355015] [2021-07-09 17:43:10,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565355015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:10,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091809646] [2021-07-09 17:43:10,263 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 [2021-07-09 17:43:10,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:10,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091809646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:10,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:10,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432681825] [2021-07-09 17:43:10,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:10,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:10,473 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) [2021-07-09 17:43:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:10,752 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-07-09 17:43:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:43:10,752 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 [2021-07-09 17:43:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:10,753 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:43:10,753 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:43:10,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:43:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-07-09 17:43:10,756 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) [2021-07-09 17:43:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-09 17:43:10,756 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-09 17:43:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:10,757 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-09 17:43:10,757 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) [2021-07-09 17:43:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-09 17:43:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:10,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:10,757 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:10,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:10,957 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:10,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:10,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 573 times [2021-07-09 17:43:10,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:10,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502036353] [2021-07-09 17:43:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:11,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:11,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502036353] [2021-07-09 17:43:11,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502036353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707388729] [2021-07-09 17:43:11,007 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 [2021-07-09 17:43:11,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707388729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213929738] [2021-07-09 17:43:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:11,213 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) [2021-07-09 17:43:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:11,445 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-07-09 17:43:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:11,445 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 [2021-07-09 17:43:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:11,446 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:43:11,446 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:43:11,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:43:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-07-09 17:43:11,449 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) [2021-07-09 17:43:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-09 17:43:11,450 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-09 17:43:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:11,450 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-09 17:43:11,450 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) [2021-07-09 17:43:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-09 17:43:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:11,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:11,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:11,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4981 [2021-07-09 17:43:11,651 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 574 times [2021-07-09 17:43:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:11,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694571992] [2021-07-09 17:43:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:11,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694571992] [2021-07-09 17:43:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694571992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824720140] [2021-07-09 17:43:11,698 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 [2021-07-09 17:43:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824720140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:11,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677652850] [2021-07-09 17:43:11,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:11,887 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) [2021-07-09 17:43:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:12,096 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-07-09 17:43:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:12,096 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 [2021-07-09 17:43:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:12,097 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:43:12,097 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:43:12,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:43:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-07-09 17:43:12,100 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) [2021-07-09 17:43:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-07-09 17:43:12,101 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-07-09 17:43:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:12,101 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-07-09 17:43:12,101 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) [2021-07-09 17:43:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-07-09 17:43:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:12,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:12,101 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:12,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:12,302 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 575 times [2021-07-09 17:43:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:12,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703483031] [2021-07-09 17:43:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:12,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:12,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703483031] [2021-07-09 17:43:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703483031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:12,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172773881] [2021-07-09 17:43:12,350 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 [2021-07-09 17:43:12,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:12,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172773881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:12,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:12,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188655339] [2021-07-09 17:43:12,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:12,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:12,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:12,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:12,545 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) [2021-07-09 17:43:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:12,791 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-07-09 17:43:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:43:12,792 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 [2021-07-09 17:43:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:12,792 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:43:12,792 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:43:12,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:43:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-07-09 17:43:12,796 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) [2021-07-09 17:43:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-07-09 17:43:12,796 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-07-09 17:43:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:12,796 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-07-09 17:43:12,796 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) [2021-07-09 17:43:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-07-09 17:43:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:12,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:12,797 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:12,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4991 [2021-07-09 17:43:12,997 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 576 times [2021-07-09 17:43:12,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:12,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315363247] [2021-07-09 17:43:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:13,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315363247] [2021-07-09 17:43:13,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315363247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493701831] [2021-07-09 17:43:13,046 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 [2021-07-09 17:43:13,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:13,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:13,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493701831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:13,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:13,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:43:13,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143571023] [2021-07-09 17:43:13,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:43:13,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:13,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:43:13,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:43:13,221 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) [2021-07-09 17:43:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:13,401 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-07-09 17:43:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:13,401 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 [2021-07-09 17:43:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:13,402 INFO L225 Difference]: With dead ends: 438 [2021-07-09 17:43:13,402 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 17:43:13,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 17:43:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-07-09 17:43:13,410 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) [2021-07-09 17:43:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-09 17:43:13,411 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-09 17:43:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:13,411 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-09 17:43:13,411 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) [2021-07-09 17:43:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-09 17:43:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:13,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:13,411 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:13,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4996,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:13,612 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 577 times [2021-07-09 17:43:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:13,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911323693] [2021-07-09 17:43:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:13,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:13,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911323693] [2021-07-09 17:43:13,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911323693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:13,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182159275] [2021-07-09 17:43:13,658 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 [2021-07-09 17:43:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182159275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:13,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:13,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:13,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597545117] [2021-07-09 17:43:13,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:13,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:13,865 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) [2021-07-09 17:43:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:14,102 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-07-09 17:43:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:14,102 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 [2021-07-09 17:43:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:14,103 INFO L225 Difference]: With dead ends: 422 [2021-07-09 17:43:14,103 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 17:43:14,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 17:43:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-07-09 17:43:14,106 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) [2021-07-09 17:43:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-07-09 17:43:14,107 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-07-09 17:43:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:14,107 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-07-09 17:43:14,107 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) [2021-07-09 17:43:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-07-09 17:43:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:14,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:14,107 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:14,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4998 [2021-07-09 17:43:14,308 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 578 times [2021-07-09 17:43:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211702437] [2021-07-09 17:43:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:14,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:14,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211702437] [2021-07-09 17:43:14,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211702437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:14,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923509560] [2021-07-09 17:43:14,355 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 [2021-07-09 17:43:14,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923509560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:14,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:14,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:14,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181385167] [2021-07-09 17:43:14,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:14,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:14,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:14,557 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) [2021-07-09 17:43:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:14,843 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-07-09 17:43:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:43:14,843 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 [2021-07-09 17:43:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:14,844 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:43:14,844 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 17:43:14,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 17:43:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-07-09 17:43:14,847 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) [2021-07-09 17:43:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-07-09 17:43:14,848 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-07-09 17:43:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:14,848 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-07-09 17:43:14,848 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) [2021-07-09 17:43:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-07-09 17:43:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:14,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:14,848 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:15,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:15,049 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 579 times [2021-07-09 17:43:15,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:15,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367203798] [2021-07-09 17:43:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:15,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367203798] [2021-07-09 17:43:15,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367203798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192632696] [2021-07-09 17:43:15,098 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 [2021-07-09 17:43:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192632696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:15,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:15,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164387725] [2021-07-09 17:43:15,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:15,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:15,298 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) [2021-07-09 17:43:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:15,520 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-07-09 17:43:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:15,520 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 [2021-07-09 17:43:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:15,521 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:43:15,521 INFO L226 Difference]: Without dead ends: 418 [2021-07-09 17:43:15,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-09 17:43:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-07-09 17:43:15,524 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) [2021-07-09 17:43:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-07-09 17:43:15,524 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-07-09 17:43:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:15,524 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-07-09 17:43:15,524 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) [2021-07-09 17:43:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-07-09 17:43:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:15,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:15,525 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:15,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-07-09 17:43:15,725 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 580 times [2021-07-09 17:43:15,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:15,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266599481] [2021-07-09 17:43:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:15,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266599481] [2021-07-09 17:43:15,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266599481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039509264] [2021-07-09 17:43:15,775 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 [2021-07-09 17:43:15,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:15,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039509264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:15,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:15,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251276104] [2021-07-09 17:43:15,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:15,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:15,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:15,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:15,969 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) [2021-07-09 17:43:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:16,180 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-07-09 17:43:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:16,180 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 [2021-07-09 17:43:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:16,181 INFO L225 Difference]: With dead ends: 453 [2021-07-09 17:43:16,181 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 17:43:16,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 17:43:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-07-09 17:43:16,184 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) [2021-07-09 17:43:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-07-09 17:43:16,185 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-07-09 17:43:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:16,185 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-07-09 17:43:16,185 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) [2021-07-09 17:43:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-07-09 17:43:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:16,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:16,185 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:16,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5021 [2021-07-09 17:43:16,386 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 581 times [2021-07-09 17:43:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:16,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187788255] [2021-07-09 17:43:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:16,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187788255] [2021-07-09 17:43:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187788255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902631201] [2021-07-09 17:43:16,435 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 [2021-07-09 17:43:16,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:16,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:16,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902631201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:16,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:16,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:16,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595751417] [2021-07-09 17:43:16,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:16,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:16,626 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) [2021-07-09 17:43:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:16,872 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-07-09 17:43:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:43:16,872 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 [2021-07-09 17:43:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:16,873 INFO L225 Difference]: With dead ends: 453 [2021-07-09 17:43:16,873 INFO L226 Difference]: Without dead ends: 453 [2021-07-09 17:43:16,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-09 17:43:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-07-09 17:43:16,876 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) [2021-07-09 17:43:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-07-09 17:43:16,877 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-07-09 17:43:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:16,877 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-07-09 17:43:16,877 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) [2021-07-09 17:43:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-07-09 17:43:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:16,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:16,877 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:17,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:17,078 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 582 times [2021-07-09 17:43:17,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:17,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227250356] [2021-07-09 17:43:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227250356] [2021-07-09 17:43:17,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227250356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577177177] [2021-07-09 17:43:17,140 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 [2021-07-09 17:43:17,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:17,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577177177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:17,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343495136] [2021-07-09 17:43:17,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:17,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:17,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:17,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:17,356 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) [2021-07-09 17:43:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:17,575 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-07-09 17:43:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:17,575 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 [2021-07-09 17:43:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:17,576 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:43:17,576 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:43:17,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:43:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-07-09 17:43:17,579 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) [2021-07-09 17:43:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-07-09 17:43:17,580 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-07-09 17:43:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:17,580 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-07-09 17:43:17,580 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) [2021-07-09 17:43:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-07-09 17:43:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:17,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:17,580 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:17,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5032 [2021-07-09 17:43:17,781 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 583 times [2021-07-09 17:43:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:17,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28422510] [2021-07-09 17:43:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:17,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28422510] [2021-07-09 17:43:17,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28422510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954065697] [2021-07-09 17:43:17,829 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 [2021-07-09 17:43:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954065697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:18,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282417927] [2021-07-09 17:43:18,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:18,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:18,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:18,018 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) [2021-07-09 17:43:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:18,254 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-07-09 17:43:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:18,255 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 [2021-07-09 17:43:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:18,255 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:43:18,255 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:43:18,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:43:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-07-09 17:43:18,259 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) [2021-07-09 17:43:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-07-09 17:43:18,260 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-07-09 17:43:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:18,260 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-07-09 17:43:18,260 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) [2021-07-09 17:43:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-07-09 17:43:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:18,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:18,260 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:18,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-07-09 17:43:18,461 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 584 times [2021-07-09 17:43:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:18,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301079798] [2021-07-09 17:43:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301079798] [2021-07-09 17:43:18,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301079798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796449768] [2021-07-09 17:43:18,515 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 [2021-07-09 17:43:18,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796449768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:18,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:18,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189413581] [2021-07-09 17:43:18,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:18,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:18,704 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) [2021-07-09 17:43:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:18,984 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-07-09 17:43:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:43:18,984 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 [2021-07-09 17:43:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:18,985 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:43:18,985 INFO L226 Difference]: Without dead ends: 504 [2021-07-09 17:43:18,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-09 17:43:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-07-09 17:43:18,989 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) [2021-07-09 17:43:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-07-09 17:43:18,989 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-07-09 17:43:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:18,989 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-07-09 17:43:18,989 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) [2021-07-09 17:43:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-07-09 17:43:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:18,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:18,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:19,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:19,190 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 585 times [2021-07-09 17:43:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:19,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477534672] [2021-07-09 17:43:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:19,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477534672] [2021-07-09 17:43:19,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477534672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68186160] [2021-07-09 17:43:19,240 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 [2021-07-09 17:43:19,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68186160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:19,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:19,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:43:19,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234563671] [2021-07-09 17:43:19,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:43:19,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:19,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:43:19,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:43:19,429 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) [2021-07-09 17:43:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:19,664 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-07-09 17:43:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:19,665 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 [2021-07-09 17:43:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:19,665 INFO L225 Difference]: With dead ends: 493 [2021-07-09 17:43:19,665 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:43:19,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:43:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-07-09 17:43:19,669 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) [2021-07-09 17:43:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-07-09 17:43:19,670 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-07-09 17:43:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:19,670 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-07-09 17:43:19,670 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) [2021-07-09 17:43:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-07-09 17:43:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:19,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:19,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:19,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5044,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:19,871 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 586 times [2021-07-09 17:43:19,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:19,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752951612] [2021-07-09 17:43:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:19,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:19,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752951612] [2021-07-09 17:43:19,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752951612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:19,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113390139] [2021-07-09 17:43:19,917 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 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 [2021-07-09 17:43:20,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:20,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:20,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113390139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:20,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:20,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:43:20,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200043889] [2021-07-09 17:43:20,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:43:20,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:43:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:43:20,086 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) [2021-07-09 17:43:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:20,294 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-07-09 17:43:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:43:20,294 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 [2021-07-09 17:43:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:20,295 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:43:20,295 INFO L226 Difference]: Without dead ends: 483 [2021-07-09 17:43:20,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-09 17:43:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-07-09 17:43:20,298 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) [2021-07-09 17:43:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-07-09 17:43:20,299 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-07-09 17:43:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:20,299 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-07-09 17:43:20,299 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) [2021-07-09 17:43:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-07-09 17:43:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:20,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:20,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:20,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-07-09 17:43:20,500 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2020715594, now seen corresponding path program 587 times [2021-07-09 17:43:20,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:20,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432151135] [2021-07-09 17:43:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:20,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432151135] [2021-07-09 17:43:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432151135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819082400] [2021-07-09 17:43:20,768 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 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 [2021-07-09 17:43:20,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:20,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:43:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:21,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:21,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:21,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,465 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-07-09 17:43:21,468 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 5 treesize of output 3 [2021-07-09 17:43:21,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:21,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:21,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:21,505 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-07-09 17:43:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:21,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819082400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:21,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:21,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-09 17:43:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859517794] [2021-07-09 17:43:21,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:43:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:43:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:21,653 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) [2021-07-09 17:43:23,135 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-07-09 17:43:23,455 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-07-09 17:43:23,715 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-09 17:43:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:24,042 INFO L93 Difference]: Finished difference Result 742 states and 2196 transitions. [2021-07-09 17:43:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:43:24,042 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 [2021-07-09 17:43:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:24,043 INFO L225 Difference]: With dead ends: 742 [2021-07-09 17:43:24,043 INFO L226 Difference]: Without dead ends: 654 [2021-07-09 17:43:24,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:43:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-09 17:43:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 354. [2021-07-09 17:43:24,048 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) [2021-07-09 17:43:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2021-07-09 17:43:24,048 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 21 [2021-07-09 17:43:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2021-07-09 17:43:24,048 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) [2021-07-09 17:43:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2021-07-09 17:43:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:24,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:24,049 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:24,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:24,249 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1242995883, now seen corresponding path program 1 times [2021-07-09 17:43:24,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:24,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810342313] [2021-07-09 17:43:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:24,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:24,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810342313] [2021-07-09 17:43:24,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810342313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:24,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207142472] [2021-07-09 17:43:24,335 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 [2021-07-09 17:43:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:24,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,530 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 13 treesize of output 9 [2021-07-09 17:43:24,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,533 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 13 treesize of output 9 [2021-07-09 17:43:24,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,551 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-09 17:43:24,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:24,552 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-09 17:43:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:24,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207142472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:24,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:24,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:24,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242285524] [2021-07-09 17:43:24,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:24,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:24,591 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) [2021-07-09 17:43:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:25,853 INFO L93 Difference]: Finished difference Result 803 states and 2292 transitions. [2021-07-09 17:43:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:43:25,854 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 [2021-07-09 17:43:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:25,855 INFO L225 Difference]: With dead ends: 803 [2021-07-09 17:43:25,855 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 17:43:25,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:43:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 17:43:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 417. [2021-07-09 17:43:25,860 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) [2021-07-09 17:43:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1267 transitions. [2021-07-09 17:43:25,860 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1267 transitions. Word has length 21 [2021-07-09 17:43:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:25,861 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1267 transitions. [2021-07-09 17:43:25,861 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) [2021-07-09 17:43:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1267 transitions. [2021-07-09 17:43:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:25,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:25,861 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] [2021-07-09 17:43:26,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5101 [2021-07-09 17:43:26,062 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 315215179, now seen corresponding path program 2 times [2021-07-09 17:43:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:26,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898642000] [2021-07-09 17:43:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:26,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898642000] [2021-07-09 17:43:26,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898642000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998173098] [2021-07-09 17:43:26,161 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 [2021-07-09 17:43:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:26,376 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 12 treesize of output 8 [2021-07-09 17:43:26,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:26,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:26,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:26,410 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-09 17:43:26,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:26,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-09 17:43:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:26,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998173098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:26,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:26,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:26,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977557878] [2021-07-09 17:43:26,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:26,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:26,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:26,466 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) [2021-07-09 17:43:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:27,811 INFO L93 Difference]: Finished difference Result 1000 states and 2902 transitions. [2021-07-09 17:43:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:43:27,811 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 [2021-07-09 17:43:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:27,812 INFO L225 Difference]: With dead ends: 1000 [2021-07-09 17:43:27,812 INFO L226 Difference]: Without dead ends: 881 [2021-07-09 17:43:27,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:43:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-09 17:43:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 434. [2021-07-09 17:43:27,818 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) [2021-07-09 17:43:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1325 transitions. [2021-07-09 17:43:27,819 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1325 transitions. Word has length 21 [2021-07-09 17:43:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:27,819 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1325 transitions. [2021-07-09 17:43:27,819 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) [2021-07-09 17:43:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1325 transitions. [2021-07-09 17:43:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:27,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:27,820 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] [2021-07-09 17:43:28,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5106,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:28,020 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1023573397, now seen corresponding path program 3 times [2021-07-09 17:43:28,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:28,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906846191] [2021-07-09 17:43:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:28,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906846191] [2021-07-09 17:43:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906846191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077118628] [2021-07-09 17:43:28,106 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 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 [2021-07-09 17:43:28,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:43:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:28,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:28,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,301 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 13 treesize of output 9 [2021-07-09 17:43:28,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,304 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 5 treesize of output 3 [2021-07-09 17:43:28,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:28,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:28,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:28,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:28,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,354 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-07-09 17:43:28,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:28,355 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-07-09 17:43:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:28,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077118628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:28,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:28,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30458580] [2021-07-09 17:43:28,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:28,430 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) [2021-07-09 17:43:29,415 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-09 17:43:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:30,124 INFO L93 Difference]: Finished difference Result 1044 states and 2937 transitions. [2021-07-09 17:43:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:43:30,124 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 [2021-07-09 17:43:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:30,126 INFO L225 Difference]: With dead ends: 1044 [2021-07-09 17:43:30,126 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 17:43:30,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:43:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 17:43:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 436. [2021-07-09 17:43:30,132 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) [2021-07-09 17:43:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1347 transitions. [2021-07-09 17:43:30,132 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1347 transitions. Word has length 21 [2021-07-09 17:43:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:30,133 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1347 transitions. [2021-07-09 17:43:30,133 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) [2021-07-09 17:43:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1347 transitions. [2021-07-09 17:43:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:30,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:30,133 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] [2021-07-09 17:43:30,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5113 [2021-07-09 17:43:30,334 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash -127683961, now seen corresponding path program 4 times [2021-07-09 17:43:30,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:30,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980580287] [2021-07-09 17:43:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:30,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980580287] [2021-07-09 17:43:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980580287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150440390] [2021-07-09 17:43:30,421 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 [2021-07-09 17:43:30,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:30,616 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 12 treesize of output 8 [2021-07-09 17:43:30,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,619 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 13 treesize of output 9 [2021-07-09 17:43:30,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:30,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,640 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-09 17:43:30,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:30,640 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-09 17:43:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150440390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785688481] [2021-07-09 17:43:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:30,680 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) [2021-07-09 17:43:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:31,831 INFO L93 Difference]: Finished difference Result 887 states and 2629 transitions. [2021-07-09 17:43:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:43:31,832 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 [2021-07-09 17:43:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:31,833 INFO L225 Difference]: With dead ends: 887 [2021-07-09 17:43:31,833 INFO L226 Difference]: Without dead ends: 768 [2021-07-09 17:43:31,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-07-09 17:43:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-07-09 17:43:31,839 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) [2021-07-09 17:43:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-07-09 17:43:31,839 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-07-09 17:43:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:31,840 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-07-09 17:43:31,840 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) [2021-07-09 17:43:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-07-09 17:43:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:31,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:31,840 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:32,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-07-09 17:43:32,041 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash 580674257, now seen corresponding path program 5 times [2021-07-09 17:43:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:32,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279374867] [2021-07-09 17:43:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:32,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:32,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279374867] [2021-07-09 17:43:32,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279374867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:32,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231727494] [2021-07-09 17:43:32,125 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 [2021-07-09 17:43:32,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:32,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:32,310 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 13 treesize of output 9 [2021-07-09 17:43:32,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,313 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 [2021-07-09 17:43:32,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:32,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,318 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 5 treesize of output 3 [2021-07-09 17:43:32,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:32,322 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,324 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 13 treesize of output 9 [2021-07-09 17:43:32,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:32,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,374 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:43:32,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:32,375 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:43:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:32,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231727494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:32,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:32,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235044067] [2021-07-09 17:43:32,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:32,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:32,462 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) [2021-07-09 17:43:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:33,968 INFO L93 Difference]: Finished difference Result 1114 states and 3228 transitions. [2021-07-09 17:43:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:43:33,969 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 [2021-07-09 17:43:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:33,970 INFO L225 Difference]: With dead ends: 1114 [2021-07-09 17:43:33,970 INFO L226 Difference]: Without dead ends: 953 [2021-07-09 17:43:33,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 958.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:43:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-09 17:43:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 450. [2021-07-09 17:43:33,976 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) [2021-07-09 17:43:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1397 transitions. [2021-07-09 17:43:33,977 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1397 transitions. Word has length 21 [2021-07-09 17:43:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:33,977 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1397 transitions. [2021-07-09 17:43:33,977 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) [2021-07-09 17:43:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1397 transitions. [2021-07-09 17:43:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:33,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:33,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:34,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5127 [2021-07-09 17:43:34,178 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1526109863, now seen corresponding path program 6 times [2021-07-09 17:43:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:34,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778005849] [2021-07-09 17:43:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:34,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:34,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778005849] [2021-07-09 17:43:34,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778005849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:34,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185742351] [2021-07-09 17:43:34,280 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 [2021-07-09 17:43:34,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:34,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:34,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,507 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 [2021-07-09 17:43:34,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:34,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:34,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,515 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 [2021-07-09 17:43:34,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,518 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 13 treesize of output 9 [2021-07-09 17:43:34,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:34,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,561 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:43:34,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:34,562 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:43:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185742351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124715411] [2021-07-09 17:43:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:34,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:34,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:34,644 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) [2021-07-09 17:43:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:36,268 INFO L93 Difference]: Finished difference Result 983 states and 2836 transitions. [2021-07-09 17:43:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:43:36,268 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 [2021-07-09 17:43:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:36,270 INFO L225 Difference]: With dead ends: 983 [2021-07-09 17:43:36,270 INFO L226 Difference]: Without dead ends: 790 [2021-07-09 17:43:36,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:43:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-07-09 17:43:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 456. [2021-07-09 17:43:36,276 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) [2021-07-09 17:43:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1429 transitions. [2021-07-09 17:43:36,277 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1429 transitions. Word has length 21 [2021-07-09 17:43:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:36,277 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1429 transitions. [2021-07-09 17:43:36,277 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) [2021-07-09 17:43:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1429 transitions. [2021-07-09 17:43:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:36,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:36,277 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:36,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:36,478 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1817626865, now seen corresponding path program 7 times [2021-07-09 17:43:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449031991] [2021-07-09 17:43:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:36,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:36,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449031991] [2021-07-09 17:43:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449031991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:36,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723635831] [2021-07-09 17:43:36,566 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 [2021-07-09 17:43:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:36,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:36,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:36,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,796 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-07-09 17:43:36,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:36,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-07-09 17:43:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:36,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723635831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:36,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:36,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329774211] [2021-07-09 17:43:36,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:36,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:36,838 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) [2021-07-09 17:43:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:38,012 INFO L93 Difference]: Finished difference Result 962 states and 2828 transitions. [2021-07-09 17:43:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:43:38,012 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 [2021-07-09 17:43:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:38,013 INFO L225 Difference]: With dead ends: 962 [2021-07-09 17:43:38,013 INFO L226 Difference]: Without dead ends: 843 [2021-07-09 17:43:38,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-07-09 17:43:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2021-07-09 17:43:38,019 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) [2021-07-09 17:43:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-07-09 17:43:38,020 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-07-09 17:43:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:38,020 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-07-09 17:43:38,020 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) [2021-07-09 17:43:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-07-09 17:43:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:38,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:38,021 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] [2021-07-09 17:43:38,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5144 [2021-07-09 17:43:38,221 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1109268647, now seen corresponding path program 8 times [2021-07-09 17:43:38,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:38,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745302191] [2021-07-09 17:43:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:38,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745302191] [2021-07-09 17:43:38,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745302191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558603989] [2021-07-09 17:43:38,304 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 [2021-07-09 17:43:38,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:38,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:38,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:38,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,487 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 [2021-07-09 17:43:38,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:38,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,493 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 5 treesize of output 3 [2021-07-09 17:43:38,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,496 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 12 treesize of output 8 [2021-07-09 17:43:38,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:38,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:38,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:38,542 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:43:38,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:38,542 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:43:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558603989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:38,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:38,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75387674] [2021-07-09 17:43:38,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:38,619 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) [2021-07-09 17:43:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:40,023 INFO L93 Difference]: Finished difference Result 1189 states and 3427 transitions. [2021-07-09 17:43:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:43:40,023 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 [2021-07-09 17:43:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:40,025 INFO L225 Difference]: With dead ends: 1189 [2021-07-09 17:43:40,025 INFO L226 Difference]: Without dead ends: 1028 [2021-07-09 17:43:40,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:43:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-09 17:43:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 460. [2021-07-09 17:43:40,034 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) [2021-07-09 17:43:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1438 transitions. [2021-07-09 17:43:40,035 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1438 transitions. Word has length 21 [2021-07-09 17:43:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:40,035 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1438 transitions. [2021-07-09 17:43:40,035 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) [2021-07-09 17:43:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1438 transitions. [2021-07-09 17:43:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:40,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:40,036 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:40,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5151,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:40,249 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:40,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1078914529, now seen corresponding path program 9 times [2021-07-09 17:43:40,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:40,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668106422] [2021-07-09 17:43:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:40,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668106422] [2021-07-09 17:43:40,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668106422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109003755] [2021-07-09 17:43:40,334 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 [2021-07-09 17:43:40,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:43:40,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:43:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:40,570 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 [2021-07-09 17:43:40,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:40,573 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 6 treesize of output 4 [2021-07-09 17:43:40,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:40,591 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-07-09 17:43:40,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:40,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-07-09 17:43:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:40,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109003755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:40,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:40,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:43:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343181443] [2021-07-09 17:43:40,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:43:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:43:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:43:40,645 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) [2021-07-09 17:43:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:41,685 INFO L93 Difference]: Finished difference Result 758 states and 2219 transitions. [2021-07-09 17:43:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:43:41,685 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 [2021-07-09 17:43:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:41,686 INFO L225 Difference]: With dead ends: 758 [2021-07-09 17:43:41,686 INFO L226 Difference]: Without dead ends: 618 [2021-07-09 17:43:41,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:43:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-07-09 17:43:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 472. [2021-07-09 17:43:41,693 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) [2021-07-09 17:43:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1467 transitions. [2021-07-09 17:43:41,693 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1467 transitions. Word has length 21 [2021-07-09 17:43:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:41,694 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1467 transitions. [2021-07-09 17:43:41,694 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) [2021-07-09 17:43:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1467 transitions. [2021-07-09 17:43:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:41,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:41,694 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:41,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-07-09 17:43:41,895 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1157086666, now seen corresponding path program 588 times [2021-07-09 17:43:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132125617] [2021-07-09 17:43:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:42,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132125617] [2021-07-09 17:43:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132125617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249054890] [2021-07-09 17:43:42,007 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 [2021-07-09 17:43:42,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:43:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:42,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:43:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,552 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 19 treesize of output 9 [2021-07-09 17:43:42,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:42,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,559 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 12 treesize of output 8 [2021-07-09 17:43:42,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,563 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 13 treesize of output 9 [2021-07-09 17:43:42,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,567 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 [2021-07-09 17:43:42,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,571 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 5 treesize of output 3 [2021-07-09 17:43:42,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:42,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:42,580 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,678 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-07-09 17:43:42,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:42,680 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-07-09 17:43:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249054890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:42,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:42,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:43:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168342188] [2021-07-09 17:43:42,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:43:42,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:42,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:43:42,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:43:42,766 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) [2021-07-09 17:43:43,119 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-07-09 17:43:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:43,524 INFO L93 Difference]: Finished difference Result 764 states and 2359 transitions. [2021-07-09 17:43:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:43:43,525 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 [2021-07-09 17:43:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:43,526 INFO L225 Difference]: With dead ends: 764 [2021-07-09 17:43:43,526 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 17:43:43,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 17:43:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 490. [2021-07-09 17:43:43,531 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) [2021-07-09 17:43:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1539 transitions. [2021-07-09 17:43:43,532 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1539 transitions. Word has length 21 [2021-07-09 17:43:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:43,532 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1539 transitions. [2021-07-09 17:43:43,532 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) [2021-07-09 17:43:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1539 transitions. [2021-07-09 17:43:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:43,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:43,533 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:43,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5171 [2021-07-09 17:43:43,734 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401856, now seen corresponding path program 589 times [2021-07-09 17:43:43,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:43,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650100371] [2021-07-09 17:43:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:43,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650100371] [2021-07-09 17:43:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650100371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518124995] [2021-07-09 17:43:43,868 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 [2021-07-09 17:43:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:43:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:44,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,467 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 18 treesize of output 1 [2021-07-09 17:43:44,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:44,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,476 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 12 treesize of output 8 [2021-07-09 17:43:44,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,481 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 18 treesize of output 12 [2021-07-09 17:43:44,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:44,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:44,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:44,523 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-07-09 17:43:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:44,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518124995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:44,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:43:44,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398320793] [2021-07-09 17:43:44,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:44,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:44,667 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) [2021-07-09 17:43:44,890 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:43:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:45,869 INFO L93 Difference]: Finished difference Result 834 states and 2548 transitions. [2021-07-09 17:43:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:43:45,870 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 [2021-07-09 17:43:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:45,871 INFO L225 Difference]: With dead ends: 834 [2021-07-09 17:43:45,871 INFO L226 Difference]: Without dead ends: 765 [2021-07-09 17:43:45,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1154.4ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:43:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-07-09 17:43:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 497. [2021-07-09 17:43:45,877 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) [2021-07-09 17:43:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1569 transitions. [2021-07-09 17:43:45,878 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1569 transitions. Word has length 21 [2021-07-09 17:43:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:45,878 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1569 transitions. [2021-07-09 17:43:45,878 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) [2021-07-09 17:43:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1569 transitions. [2021-07-09 17:43:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:45,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:45,879 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:46,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-07-09 17:43:46,079 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -777988342, now seen corresponding path program 590 times [2021-07-09 17:43:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:46,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725566261] [2021-07-09 17:43:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:46,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725566261] [2021-07-09 17:43:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725566261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135496494] [2021-07-09 17:43:46,222 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 [2021-07-09 17:43:46,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:46,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:43:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,786 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 25 treesize of output 13 [2021-07-09 17:43:46,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:46,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:47,002 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-09 17:43:47,002 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-07-09 17:43:47,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:43:47,004 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-07-09 17:43:47,122 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 17:43:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:47,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135496494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:47,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:47,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:43:47,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109769988] [2021-07-09 17:43:47,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:43:47,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:43:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:43:47,228 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) [2021-07-09 17:43:47,816 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 17:43:48,028 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-09 17:43:48,256 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 17:43:48,465 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-07-09 17:43:48,686 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:43:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:48,757 INFO L93 Difference]: Finished difference Result 823 states and 2486 transitions. [2021-07-09 17:43:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:43:48,757 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 [2021-07-09 17:43:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:48,759 INFO L225 Difference]: With dead ends: 823 [2021-07-09 17:43:48,759 INFO L226 Difference]: Without dead ends: 729 [2021-07-09 17:43:48,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1579.9ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-07-09 17:43:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 482. [2021-07-09 17:43:48,764 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) [2021-07-09 17:43:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1504 transitions. [2021-07-09 17:43:48,765 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1504 transitions. Word has length 21 [2021-07-09 17:43:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:48,765 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1504 transitions. [2021-07-09 17:43:48,765 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) [2021-07-09 17:43:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1504 transitions. [2021-07-09 17:43:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:48,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:48,766 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:48,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5274,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:48,966 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1120947862, now seen corresponding path program 591 times [2021-07-09 17:43:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:48,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136913062] [2021-07-09 17:43:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:49,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136913062] [2021-07-09 17:43:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136913062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922462649] [2021-07-09 17:43:49,099 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 [2021-07-09 17:43:49,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:43:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:43:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:49,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:49,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:49,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:49,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:49,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,568 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 13 treesize of output 9 [2021-07-09 17:43:49,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,573 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 12 treesize of output 1 [2021-07-09 17:43:49,574 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:49,577 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,658 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-07-09 17:43:49,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:49,660 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-07-09 17:43:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:49,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922462649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:49,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:49,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:43:49,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151000180] [2021-07-09 17:43:49,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:43:49,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:43:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:43:49,743 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) [2021-07-09 17:43:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:50,385 INFO L93 Difference]: Finished difference Result 767 states and 2356 transitions. [2021-07-09 17:43:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:50,386 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 [2021-07-09 17:43:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:50,387 INFO L225 Difference]: With dead ends: 767 [2021-07-09 17:43:50,387 INFO L226 Difference]: Without dead ends: 720 [2021-07-09 17:43:50,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-09 17:43:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 498. [2021-07-09 17:43:50,393 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) [2021-07-09 17:43:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1569 transitions. [2021-07-09 17:43:50,394 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1569 transitions. Word has length 21 [2021-07-09 17:43:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:50,394 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1569 transitions. [2021-07-09 17:43:50,394 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) [2021-07-09 17:43:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1569 transitions. [2021-07-09 17:43:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:50,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:50,395 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:50,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5349 [2021-07-09 17:43:50,595 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash 697629236, now seen corresponding path program 592 times [2021-07-09 17:43:50,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:50,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203823157] [2021-07-09 17:43:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:50,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203823157] [2021-07-09 17:43:50,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203823157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403192362] [2021-07-09 17:43:50,744 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 [2021-07-09 17:43:50,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:43:50,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:51,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:51,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:51,271 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:51,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:51,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:51,338 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-09 17:43:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403192362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:51,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:43:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917355671] [2021-07-09 17:43:51,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:43:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:43:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:43:51,552 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) [2021-07-09 17:43:52,454 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 17:43:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:52,651 INFO L93 Difference]: Finished difference Result 811 states and 2461 transitions. [2021-07-09 17:43:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:43:52,652 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 [2021-07-09 17:43:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:52,653 INFO L225 Difference]: With dead ends: 811 [2021-07-09 17:43:52,653 INFO L226 Difference]: Without dead ends: 742 [2021-07-09 17:43:52,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1114.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-09 17:43:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 491. [2021-07-09 17:43:52,659 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) [2021-07-09 17:43:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1539 transitions. [2021-07-09 17:43:52,659 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1539 transitions. Word has length 21 [2021-07-09 17:43:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:52,660 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1539 transitions. [2021-07-09 17:43:52,660 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) [2021-07-09 17:43:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1539 transitions. [2021-07-09 17:43:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:52,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:52,660 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5391,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:52,861 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -363148854, now seen corresponding path program 593 times [2021-07-09 17:43:52,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:52,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303356423] [2021-07-09 17:43:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:53,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303356423] [2021-07-09 17:43:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303356423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282357939] [2021-07-09 17:43:53,006 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 [2021-07-09 17:43:53,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:53,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:43:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:53,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:53,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,503 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 19 treesize of output 13 [2021-07-09 17:43:53,504 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,508 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 25 treesize of output 13 [2021-07-09 17:43:53,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:53,513 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,517 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 24 treesize of output 1 [2021-07-09 17:43:53,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:53,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:53,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,530 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:53,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:43:53,534 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,538 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 5 treesize of output 3 [2021-07-09 17:43:53,539 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:53,543 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,633 INFO L628 ElimStorePlain]: treesize reduction 146, result has 41.1 percent of original size [2021-07-09 17:43:53,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:53,634 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:677, output treesize:70 [2021-07-09 17:43:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282357939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:53,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-09 17:43:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383800183] [2021-07-09 17:43:53,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:43:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:43:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:53,818 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) [2021-07-09 17:43:54,639 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-09 17:43:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:54,839 INFO L93 Difference]: Finished difference Result 931 states and 2746 transitions. [2021-07-09 17:43:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:43:54,840 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 [2021-07-09 17:43:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:54,841 INFO L225 Difference]: With dead ends: 931 [2021-07-09 17:43:54,841 INFO L226 Difference]: Without dead ends: 847 [2021-07-09 17:43:54,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-09 17:43:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 515. [2021-07-09 17:43:54,847 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) [2021-07-09 17:43:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1646 transitions. [2021-07-09 17:43:54,848 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1646 transitions. Word has length 21 [2021-07-09 17:43:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1646 transitions. [2021-07-09 17:43:54,848 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) [2021-07-09 17:43:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1646 transitions. [2021-07-09 17:43:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:54,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:54,849 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:55,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5465 [2021-07-09 17:43:55,049 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1269902538, now seen corresponding path program 594 times [2021-07-09 17:43:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:55,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029257875] [2021-07-09 17:43:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:55,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:55,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029257875] [2021-07-09 17:43:55,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029257875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:55,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318611714] [2021-07-09 17:43:55,222 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 [2021-07-09 17:43:55,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:43:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:55,472 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 18 treesize of output 12 [2021-07-09 17:43:55,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,476 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 12 treesize of output 8 [2021-07-09 17:43:55,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,480 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 19 treesize of output 13 [2021-07-09 17:43:55,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:55,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,496 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 [2021-07-09 17:43:55,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,499 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 18 treesize of output 12 [2021-07-09 17:43:55,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:55,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:55,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:55,509 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:55,512 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:55,515 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,577 INFO L628 ElimStorePlain]: treesize reduction 46, result has 63.2 percent of original size [2021-07-09 17:43:55,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:55,578 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-07-09 17:43:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318611714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:55,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:55,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:43:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682681261] [2021-07-09 17:43:55,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:55,717 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) [2021-07-09 17:43:56,120 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-09 17:43:56,289 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-09 17:43:56,443 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 17:43:56,617 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-09 17:43:56,769 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:43:56,939 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-09 17:43:57,075 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-09 17:43:57,370 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 17:43:57,517 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-09 17:43:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:57,525 INFO L93 Difference]: Finished difference Result 1021 states and 2942 transitions. [2021-07-09 17:43:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:43:57,525 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 [2021-07-09 17:43:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:57,527 INFO L225 Difference]: With dead ends: 1021 [2021-07-09 17:43:57,527 INFO L226 Difference]: Without dead ends: 915 [2021-07-09 17:43:57,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1778.3ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:43:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-07-09 17:43:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 510. [2021-07-09 17:43:57,533 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) [2021-07-09 17:43:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1619 transitions. [2021-07-09 17:43:57,534 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1619 transitions. Word has length 21 [2021-07-09 17:43:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:57,534 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1619 transitions. [2021-07-09 17:43:57,534 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) [2021-07-09 17:43:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1619 transitions. [2021-07-09 17:43:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:57,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:57,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:57,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:57,735 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1917789974, now seen corresponding path program 595 times [2021-07-09 17:43:57,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:57,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215023843] [2021-07-09 17:43:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:57,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215023843] [2021-07-09 17:43:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215023843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276732343] [2021-07-09 17:43:57,903 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 [2021-07-09 17:43:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:43:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:58,188 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 12 treesize of output 8 [2021-07-09 17:43:58,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,191 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 11 treesize of output 7 [2021-07-09 17:43:58,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:58,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:58,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:58,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,222 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-07-09 17:43:58,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:58,223 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-07-09 17:43:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276732343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:43:58,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964423757] [2021-07-09 17:43:58,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:58,287 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) [2021-07-09 17:43:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:59,106 INFO L93 Difference]: Finished difference Result 875 states and 2605 transitions. [2021-07-09 17:43:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:43:59,106 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 [2021-07-09 17:43:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:59,108 INFO L225 Difference]: With dead ends: 875 [2021-07-09 17:43:59,108 INFO L226 Difference]: Without dead ends: 806 [2021-07-09 17:43:59,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:43:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-07-09 17:43:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 514. [2021-07-09 17:43:59,114 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) [2021-07-09 17:43:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1633 transitions. [2021-07-09 17:43:59,115 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1633 transitions. Word has length 21 [2021-07-09 17:43:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:59,115 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1633 transitions. [2021-07-09 17:43:59,115 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) [2021-07-09 17:43:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1633 transitions. [2021-07-09 17:43:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:59,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:59,116 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] [2021-07-09 17:43:59,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5598,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:59,316 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1093182143, now seen corresponding path program 10 times [2021-07-09 17:43:59,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:59,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682269524] [2021-07-09 17:43:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:59,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682269524] [2021-07-09 17:43:59,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682269524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050115336] [2021-07-09 17:43:59,431 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 [2021-07-09 17:43:59,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:59,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:59,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:59,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,664 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 5 treesize of output 3 [2021-07-09 17:43:59,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,667 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 [2021-07-09 17:43:59,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:43:59,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:59,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,710 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-09 17:43:59,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:59,711 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-09 17:43:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:59,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050115336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:59,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:43:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312058506] [2021-07-09 17:43:59,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:59,785 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) [2021-07-09 17:44:01,316 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:44:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:01,834 INFO L93 Difference]: Finished difference Result 1303 states and 3840 transitions. [2021-07-09 17:44:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:44:01,834 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 [2021-07-09 17:44:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:01,836 INFO L225 Difference]: With dead ends: 1303 [2021-07-09 17:44:01,836 INFO L226 Difference]: Without dead ends: 1100 [2021-07-09 17:44:01,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1637.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:44:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-07-09 17:44:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 554. [2021-07-09 17:44:01,844 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) [2021-07-09 17:44:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-07-09 17:44:01,845 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-07-09 17:44:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:01,845 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-07-09 17:44:01,845 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) [2021-07-09 17:44:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-07-09 17:44:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:01,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:01,845 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:02,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:02,046 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:02,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1361928571, now seen corresponding path program 11 times [2021-07-09 17:44:02,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:02,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284287416] [2021-07-09 17:44:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:02,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284287416] [2021-07-09 17:44:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284287416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746437428] [2021-07-09 17:44:02,150 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 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 [2021-07-09 17:44:02,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:02,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:02,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:44:02,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:02,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:02,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,341 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 [2021-07-09 17:44:02,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:02,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:02,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:02,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,388 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-09 17:44:02,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:02,389 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-09 17:44:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746437428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:02,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:02,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331268472] [2021-07-09 17:44:02,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:02,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:02,492 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) [2021-07-09 17:44:03,714 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:44:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:04,079 INFO L93 Difference]: Finished difference Result 1175 states and 3509 transitions. [2021-07-09 17:44:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:44:04,079 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 [2021-07-09 17:44:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:04,081 INFO L225 Difference]: With dead ends: 1175 [2021-07-09 17:44:04,081 INFO L226 Difference]: Without dead ends: 1007 [2021-07-09 17:44:04,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1168.8ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:44:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-07-09 17:44:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 554. [2021-07-09 17:44:04,088 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) [2021-07-09 17:44:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-07-09 17:44:04,089 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-07-09 17:44:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:04,089 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-07-09 17:44:04,089 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) [2021-07-09 17:44:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-07-09 17:44:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:04,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:04,090 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] [2021-07-09 17:44:04,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5620,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:04,290 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1696858245, now seen corresponding path program 12 times [2021-07-09 17:44:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:04,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597458908] [2021-07-09 17:44:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:04,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597458908] [2021-07-09 17:44:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597458908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188319215] [2021-07-09 17:44:04,418 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 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 [2021-07-09 17:44:04,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:44:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:04,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,652 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 5 treesize of output 3 [2021-07-09 17:44:04,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,655 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 [2021-07-09 17:44:04,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,659 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 [2021-07-09 17:44:04,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:04,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,700 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-09 17:44:04,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:04,701 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-09 17:44:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188319215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:04,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:04,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:04,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043999545] [2021-07-09 17:44:04,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:04,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:04,775 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) [2021-07-09 17:44:06,248 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:44:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:06,716 INFO L93 Difference]: Finished difference Result 1201 states and 3525 transitions. [2021-07-09 17:44:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:44:06,716 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 [2021-07-09 17:44:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:06,718 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 17:44:06,718 INFO L226 Difference]: Without dead ends: 1009 [2021-07-09 17:44:06,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1500.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:44:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-09 17:44:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 561. [2021-07-09 17:44:06,725 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) [2021-07-09 17:44:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1801 transitions. [2021-07-09 17:44:06,726 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1801 transitions. Word has length 21 [2021-07-09 17:44:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:06,726 INFO L482 AbstractCegarLoop]: Abstraction has 561 states and 1801 transitions. [2021-07-09 17:44:06,726 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) [2021-07-09 17:44:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1801 transitions. [2021-07-09 17:44:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:06,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:06,727 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:06,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:06,927 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:06,927 INFO L82 PathProgramCache]: Analyzing trace with hash 219055557, now seen corresponding path program 13 times [2021-07-09 17:44:06,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:06,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309749304] [2021-07-09 17:44:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:07,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:07,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309749304] [2021-07-09 17:44:07,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309749304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:07,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373226233] [2021-07-09 17:44:07,037 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 [2021-07-09 17:44:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373226233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:07,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:07,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933887874] [2021-07-09 17:44:07,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:07,287 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) [2021-07-09 17:44:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:08,809 INFO L93 Difference]: Finished difference Result 1086 states and 3218 transitions. [2021-07-09 17:44:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:44:08,809 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 [2021-07-09 17:44:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:08,811 INFO L225 Difference]: With dead ends: 1086 [2021-07-09 17:44:08,811 INFO L226 Difference]: Without dead ends: 857 [2021-07-09 17:44:08,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1229.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:44:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-09 17:44:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 564. [2021-07-09 17:44:08,818 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) [2021-07-09 17:44:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1803 transitions. [2021-07-09 17:44:08,818 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1803 transitions. Word has length 21 [2021-07-09 17:44:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:08,819 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1803 transitions. [2021-07-09 17:44:08,819 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) [2021-07-09 17:44:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1803 transitions. [2021-07-09 17:44:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:08,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:08,819 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] [2021-07-09 17:44:09,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:09,020 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1157506963, now seen corresponding path program 14 times [2021-07-09 17:44:09,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:09,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505189965] [2021-07-09 17:44:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:09,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505189965] [2021-07-09 17:44:09,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505189965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626054024] [2021-07-09 17:44:09,109 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 [2021-07-09 17:44:09,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:09,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:09,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:09,320 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 5 treesize of output 3 [2021-07-09 17:44:09,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:09,323 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 12 treesize of output 8 [2021-07-09 17:44:09,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:09,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:09,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:09,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:09,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:09,367 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-09 17:44:09,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:09,368 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-09 17:44:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:09,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626054024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:09,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:09,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203583700] [2021-07-09 17:44:09,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:09,443 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) [2021-07-09 17:44:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:10,900 INFO L93 Difference]: Finished difference Result 1381 states and 4019 transitions. [2021-07-09 17:44:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:44:10,900 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 [2021-07-09 17:44:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:10,902 INFO L225 Difference]: With dead ends: 1381 [2021-07-09 17:44:10,902 INFO L226 Difference]: Without dead ends: 1147 [2021-07-09 17:44:10,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 908.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:44:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-07-09 17:44:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2021-07-09 17:44:10,914 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) [2021-07-09 17:44:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1838 transitions. [2021-07-09 17:44:10,916 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1838 transitions. Word has length 21 [2021-07-09 17:44:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:10,916 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1838 transitions. [2021-07-09 17:44:10,916 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) [2021-07-09 17:44:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1838 transitions. [2021-07-09 17:44:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:10,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:10,917 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] [2021-07-09 17:44:11,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5646 [2021-07-09 17:44:11,129 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -171190457, now seen corresponding path program 15 times [2021-07-09 17:44:11,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:11,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397311402] [2021-07-09 17:44:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:11,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397311402] [2021-07-09 17:44:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397311402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684196238] [2021-07-09 17:44:11,217 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 [2021-07-09 17:44:11,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:44:11,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:44:11,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:11,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:11,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:11,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,481 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 13 treesize of output 9 [2021-07-09 17:44:11,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:11,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,516 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-07-09 17:44:11,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:11,517 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:84, output treesize:41 [2021-07-09 17:44:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684196238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:11,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:11,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:44:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075802969] [2021-07-09 17:44:11,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:11,590 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) [2021-07-09 17:44:12,125 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 17:44:12,244 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 17:44:12,568 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 17:44:12,981 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 17:44:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:13,443 INFO L93 Difference]: Finished difference Result 1101 states and 3236 transitions. [2021-07-09 17:44:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:44:13,443 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 [2021-07-09 17:44:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:13,445 INFO L225 Difference]: With dead ends: 1101 [2021-07-09 17:44:13,445 INFO L226 Difference]: Without dead ends: 897 [2021-07-09 17:44:13,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1752.8ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:44:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-09 17:44:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 575. [2021-07-09 17:44:13,452 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) [2021-07-09 17:44:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1851 transitions. [2021-07-09 17:44:13,453 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1851 transitions. Word has length 21 [2021-07-09 17:44:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:13,453 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1851 transitions. [2021-07-09 17:44:13,453 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) [2021-07-09 17:44:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1851 transitions. [2021-07-09 17:44:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:13,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:13,454 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:13,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5653,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:13,655 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 586681167, now seen corresponding path program 16 times [2021-07-09 17:44:13,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:13,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777219244] [2021-07-09 17:44:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:13,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:13,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777219244] [2021-07-09 17:44:13,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777219244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:13,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59472951] [2021-07-09 17:44:13,761 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 [2021-07-09 17:44:13,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:13,945 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 [2021-07-09 17:44:13,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,948 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 12 treesize of output 8 [2021-07-09 17:44:13,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:13,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,954 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 5 treesize of output 3 [2021-07-09 17:44:13,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,957 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 12 treesize of output 8 [2021-07-09 17:44:13,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:13,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:13,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:13,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:14,004 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:44:14,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:14,005 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:44:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59472951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:14,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:14,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:14,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940729630] [2021-07-09 17:44:14,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:14,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:14,082 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) [2021-07-09 17:44:15,388 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-09 17:44:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:15,984 INFO L93 Difference]: Finished difference Result 1407 states and 4127 transitions. [2021-07-09 17:44:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:44:15,985 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 [2021-07-09 17:44:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:15,987 INFO L225 Difference]: With dead ends: 1407 [2021-07-09 17:44:15,987 INFO L226 Difference]: Without dead ends: 1183 [2021-07-09 17:44:15,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1400.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:44:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-09 17:44:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 569. [2021-07-09 17:44:15,995 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) [2021-07-09 17:44:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1840 transitions. [2021-07-09 17:44:15,995 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1840 transitions. Word has length 21 [2021-07-09 17:44:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:15,996 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1840 transitions. [2021-07-09 17:44:15,996 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) [2021-07-09 17:44:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1840 transitions. [2021-07-09 17:44:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:15,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:15,996 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] [2021-07-09 17:44:16,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5665,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:16,197 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2080518403, now seen corresponding path program 17 times [2021-07-09 17:44:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462585234] [2021-07-09 17:44:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:16,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462585234] [2021-07-09 17:44:16,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462585234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405881488] [2021-07-09 17:44:16,296 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 [2021-07-09 17:44:16,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:44:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:16,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:16,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,509 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 12 treesize of output 8 [2021-07-09 17:44:16,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:16,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,515 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 [2021-07-09 17:44:16,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,518 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 12 treesize of output 8 [2021-07-09 17:44:16,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,521 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 13 treesize of output 9 [2021-07-09 17:44:16,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:16,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,564 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:44:16,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:16,565 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:44:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405881488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:16,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:16,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:16,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135457498] [2021-07-09 17:44:16,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:16,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:16,646 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) [2021-07-09 17:44:17,983 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:44:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:18,608 INFO L93 Difference]: Finished difference Result 1420 states and 4101 transitions. [2021-07-09 17:44:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:44:18,608 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 [2021-07-09 17:44:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:18,610 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 17:44:18,610 INFO L226 Difference]: Without dead ends: 1201 [2021-07-09 17:44:18,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1551.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:44:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-09 17:44:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 569. [2021-07-09 17:44:18,619 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) [2021-07-09 17:44:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1833 transitions. [2021-07-09 17:44:18,620 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1833 transitions. Word has length 21 [2021-07-09 17:44:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:18,620 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1833 transitions. [2021-07-09 17:44:18,620 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) [2021-07-09 17:44:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1833 transitions. [2021-07-09 17:44:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:18,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:18,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:18,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5674 [2021-07-09 17:44:18,821 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash 736646205, now seen corresponding path program 18 times [2021-07-09 17:44:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:18,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668880328] [2021-07-09 17:44:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:18,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:18,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668880328] [2021-07-09 17:44:18,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668880328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:18,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829492442] [2021-07-09 17:44:18,939 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 [2021-07-09 17:44:19,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:44:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:19,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829492442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:19,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:19,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:19,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862877411] [2021-07-09 17:44:19,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:19,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:19,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:19,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:19,196 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) [2021-07-09 17:44:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:21,121 INFO L93 Difference]: Finished difference Result 1407 states and 4062 transitions. [2021-07-09 17:44:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:44:21,122 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 [2021-07-09 17:44:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:21,124 INFO L225 Difference]: With dead ends: 1407 [2021-07-09 17:44:21,124 INFO L226 Difference]: Without dead ends: 1151 [2021-07-09 17:44:21,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1426.0ms TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:44:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-07-09 17:44:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 547. [2021-07-09 17:44:21,132 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) [2021-07-09 17:44:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1744 transitions. [2021-07-09 17:44:21,133 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1744 transitions. Word has length 21 [2021-07-09 17:44:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:21,133 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1744 transitions. [2021-07-09 17:44:21,133 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) [2021-07-09 17:44:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1744 transitions. [2021-07-09 17:44:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:21,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:21,134 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:21,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:21,334 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:21,334 INFO L82 PathProgramCache]: Analyzing trace with hash 648620313, now seen corresponding path program 19 times [2021-07-09 17:44:21,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:21,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452300500] [2021-07-09 17:44:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:21,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:21,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452300500] [2021-07-09 17:44:21,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452300500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:21,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327471689] [2021-07-09 17:44:21,428 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 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 [2021-07-09 17:44:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:21,656 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 [2021-07-09 17:44:21,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,659 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 5 treesize of output 3 [2021-07-09 17:44:21,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:21,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,665 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 13 treesize of output 9 [2021-07-09 17:44:21,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:21,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,707 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-07-09 17:44:21,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:21,707 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-07-09 17:44:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327471689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:21,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:21,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:21,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336914005] [2021-07-09 17:44:21,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:21,786 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) [2021-07-09 17:44:23,420 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 17:44:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:24,926 INFO L93 Difference]: Finished difference Result 1838 states and 5319 transitions. [2021-07-09 17:44:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:44:24,926 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 [2021-07-09 17:44:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:24,928 INFO L225 Difference]: With dead ends: 1838 [2021-07-09 17:44:24,929 INFO L226 Difference]: Without dead ends: 1526 [2021-07-09 17:44:24,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2549.2ms TimeCoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:44:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-09 17:44:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 589. [2021-07-09 17:44:24,939 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) [2021-07-09 17:44:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-07-09 17:44:24,940 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-07-09 17:44:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:24,940 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-07-09 17:44:24,940 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) [2021-07-09 17:44:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-07-09 17:44:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:24,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:24,941 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] [2021-07-09 17:44:25,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:25,141 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1068180589, now seen corresponding path program 20 times [2021-07-09 17:44:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:25,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759631532] [2021-07-09 17:44:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:25,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759631532] [2021-07-09 17:44:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759631532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117962399] [2021-07-09 17:44:25,266 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 [2021-07-09 17:44:25,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:25,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:25,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,500 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 [2021-07-09 17:44:25,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:25,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:25,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,509 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 12 treesize of output 8 [2021-07-09 17:44:25,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:25,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:25,515 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:25,555 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-07-09 17:44:25,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:25,556 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-07-09 17:44:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:25,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117962399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:25,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:25,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:25,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817542483] [2021-07-09 17:44:25,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:25,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:25,643 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) [2021-07-09 17:44:26,325 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-09 17:44:26,843 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-07-09 17:44:27,075 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-09 17:44:27,466 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:44:27,659 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 17:44:27,784 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-07-09 17:44:28,252 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-07-09 17:44:28,416 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-09 17:44:28,662 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 17:44:28,848 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 17:44:29,495 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-09 17:44:30,110 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-09 17:44:30,307 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 17:44:30,465 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-09 17:44:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:30,480 INFO L93 Difference]: Finished difference Result 1916 states and 5539 transitions. [2021-07-09 17:44:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:44:30,481 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 [2021-07-09 17:44:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:30,483 INFO L225 Difference]: With dead ends: 1916 [2021-07-09 17:44:30,483 INFO L226 Difference]: Without dead ends: 1653 [2021-07-09 17:44:30,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4141.7ms TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:44:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-07-09 17:44:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 583. [2021-07-09 17:44:30,494 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) [2021-07-09 17:44:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1885 transitions. [2021-07-09 17:44:30,495 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1885 transitions. Word has length 21 [2021-07-09 17:44:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:30,495 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1885 transitions. [2021-07-09 17:44:30,495 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) [2021-07-09 17:44:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1885 transitions. [2021-07-09 17:44:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:30,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:30,495 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] [2021-07-09 17:44:30,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:30,696 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:30,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1985017005, now seen corresponding path program 21 times [2021-07-09 17:44:30,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:30,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991367470] [2021-07-09 17:44:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:30,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:30,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991367470] [2021-07-09 17:44:30,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991367470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:30,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777016251] [2021-07-09 17:44:30,805 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 [2021-07-09 17:44:30,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:44:30,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:30,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:31,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777016251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:31,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:31,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:44:31,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864724055] [2021-07-09 17:44:31,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:31,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:31,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:31,094 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) [2021-07-09 17:44:31,681 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 17:44:32,147 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-09 17:44:33,735 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-07-09 17:44:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:33,862 INFO L93 Difference]: Finished difference Result 1743 states and 5017 transitions. [2021-07-09 17:44:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:44:33,863 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 [2021-07-09 17:44:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:33,865 INFO L225 Difference]: With dead ends: 1743 [2021-07-09 17:44:33,865 INFO L226 Difference]: Without dead ends: 1466 [2021-07-09 17:44:33,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2221.6ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:44:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-07-09 17:44:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 573. [2021-07-09 17:44:33,874 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) [2021-07-09 17:44:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1843 transitions. [2021-07-09 17:44:33,875 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1843 transitions. Word has length 21 [2021-07-09 17:44:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1843 transitions. [2021-07-09 17:44:33,875 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) [2021-07-09 17:44:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1843 transitions. [2021-07-09 17:44:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:33,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:33,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:34,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5711 [2021-07-09 17:44:34,077 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 596 times [2021-07-09 17:44:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:34,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124487746] [2021-07-09 17:44:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:34,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124487746] [2021-07-09 17:44:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124487746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207186412] [2021-07-09 17:44:34,182 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 [2021-07-09 17:44:34,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:44:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:34,657 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 12 treesize of output 8 [2021-07-09 17:44:34,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,663 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 12 treesize of output 1 [2021-07-09 17:44:34,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,667 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 13 treesize of output 9 [2021-07-09 17:44:34,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:34,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:34,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:34,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:34,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,682 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 5 treesize of output 3 [2021-07-09 17:44:34,683 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,686 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 13 treesize of output 9 [2021-07-09 17:44:34,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:34,775 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-07-09 17:44:34,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:34,776 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-07-09 17:44:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:34,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207186412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:34,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:34,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:44:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211348710] [2021-07-09 17:44:34,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:44:34,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:44:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:44:34,863 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) [2021-07-09 17:44:35,194 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-07-09 17:44:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:35,584 INFO L93 Difference]: Finished difference Result 796 states and 2524 transitions. [2021-07-09 17:44:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:44:35,585 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 [2021-07-09 17:44:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:35,586 INFO L225 Difference]: With dead ends: 796 [2021-07-09 17:44:35,586 INFO L226 Difference]: Without dead ends: 749 [2021-07-09 17:44:35,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-09 17:44:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 612. [2021-07-09 17:44:35,592 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) [2021-07-09 17:44:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1982 transitions. [2021-07-09 17:44:35,593 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1982 transitions. Word has length 21 [2021-07-09 17:44:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:35,593 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1982 transitions. [2021-07-09 17:44:35,593 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) [2021-07-09 17:44:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1982 transitions. [2021-07-09 17:44:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:35,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:35,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:35,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5717,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:35,795 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 597 times [2021-07-09 17:44:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:35,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595307121] [2021-07-09 17:44:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:35,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595307121] [2021-07-09 17:44:35,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595307121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090122971] [2021-07-09 17:44:35,959 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 [2021-07-09 17:44:36,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:44:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:44:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,540 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 19 treesize of output 9 [2021-07-09 17:44:36,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,544 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 5 treesize of output 3 [2021-07-09 17:44:36,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:36,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:36,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:36,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,559 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 [2021-07-09 17:44:36,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:36,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:36,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:36,646 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-07-09 17:44:36,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:36,648 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-07-09 17:44:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:36,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090122971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:36,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:36,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:44:36,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372890535] [2021-07-09 17:44:36,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:44:36,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:44:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:44:36,734 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) [2021-07-09 17:44:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:37,503 INFO L93 Difference]: Finished difference Result 836 states and 2636 transitions. [2021-07-09 17:44:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:44:37,503 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 [2021-07-09 17:44:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:37,505 INFO L225 Difference]: With dead ends: 836 [2021-07-09 17:44:37,505 INFO L226 Difference]: Without dead ends: 789 [2021-07-09 17:44:37,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-07-09 17:44:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 619. [2021-07-09 17:44:37,512 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) [2021-07-09 17:44:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2011 transitions. [2021-07-09 17:44:37,513 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2011 transitions. Word has length 21 [2021-07-09 17:44:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:37,513 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2011 transitions. [2021-07-09 17:44:37,513 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) [2021-07-09 17:44:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2011 transitions. [2021-07-09 17:44:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:37,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:37,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:37,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5760 [2021-07-09 17:44:37,714 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 598 times [2021-07-09 17:44:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:37,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80792364] [2021-07-09 17:44:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:37,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80792364] [2021-07-09 17:44:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80792364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164870512] [2021-07-09 17:44:37,837 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 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 [2021-07-09 17:44:37,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:44:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:38,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:38,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:38,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:38,451 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:38,571 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 17:44:38,571 INFO L628 ElimStorePlain]: treesize reduction 34, result has 80.1 percent of original size [2021-07-09 17:44:38,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:38,573 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-09 17:44:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:38,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164870512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:38,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:38,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:44:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593861930] [2021-07-09 17:44:38,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:38,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:38,800 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) [2021-07-09 17:44:39,847 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 17:44:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:40,057 INFO L93 Difference]: Finished difference Result 840 states and 2630 transitions. [2021-07-09 17:44:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:44:40,058 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 [2021-07-09 17:44:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:40,059 INFO L225 Difference]: With dead ends: 840 [2021-07-09 17:44:40,059 INFO L226 Difference]: Without dead ends: 771 [2021-07-09 17:44:40,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:44:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-09 17:44:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 605. [2021-07-09 17:44:40,065 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) [2021-07-09 17:44:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1953 transitions. [2021-07-09 17:44:40,066 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1953 transitions. Word has length 21 [2021-07-09 17:44:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:40,066 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1953 transitions. [2021-07-09 17:44:40,066 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) [2021-07-09 17:44:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1953 transitions. [2021-07-09 17:44:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:40,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:40,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:40,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:40,268 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 599 times [2021-07-09 17:44:40,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:40,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096435991] [2021-07-09 17:44:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:40,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:40,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096435991] [2021-07-09 17:44:40,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096435991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:40,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493612017] [2021-07-09 17:44:40,431 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 [2021-07-09 17:44:40,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:44:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:40,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:40,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:40,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,852 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 [2021-07-09 17:44:40,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:40,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:40,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:40,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:40,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:40,934 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:44:40,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:40,936 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-07-09 17:44:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:41,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493612017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:41,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:41,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:44:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465956744] [2021-07-09 17:44:41,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:41,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:41,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:41,011 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) [2021-07-09 17:44:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:41,413 INFO L93 Difference]: Finished difference Result 805 states and 2540 transitions. [2021-07-09 17:44:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:44:41,414 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 [2021-07-09 17:44:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:41,415 INFO L225 Difference]: With dead ends: 805 [2021-07-09 17:44:41,415 INFO L226 Difference]: Without dead ends: 758 [2021-07-09 17:44:41,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-09 17:44:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 626. [2021-07-09 17:44:41,421 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) [2021-07-09 17:44:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2035 transitions. [2021-07-09 17:44:41,422 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2035 transitions. Word has length 21 [2021-07-09 17:44:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:41,422 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 2035 transitions. [2021-07-09 17:44:41,422 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) [2021-07-09 17:44:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2035 transitions. [2021-07-09 17:44:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:41,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:41,423 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:41,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:41,624 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 600 times [2021-07-09 17:44:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:41,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110276712] [2021-07-09 17:44:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:41,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:41,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110276712] [2021-07-09 17:44:41,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110276712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404069449] [2021-07-09 17:44:41,753 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 [2021-07-09 17:44:41,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:44:41,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:44:41,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:42,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,419 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 25 treesize of output 13 [2021-07-09 17:44:42,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,453 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 25 treesize of output 13 [2021-07-09 17:44:42,454 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,458 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 24 treesize of output 12 [2021-07-09 17:44:42,459 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:42,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:42,646 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 17:44:42,646 INFO L628 ElimStorePlain]: treesize reduction 75, result has 71.5 percent of original size [2021-07-09 17:44:42,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:44:42,649 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-07-09 17:44:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:42,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404069449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:42,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:42,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:44:42,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336394505] [2021-07-09 17:44:42,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:42,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:42,855 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) [2021-07-09 17:44:43,284 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 17:44:43,444 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:44:43,607 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-09 17:44:43,755 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-09 17:44:43,900 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 17:44:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:43,956 INFO L93 Difference]: Finished difference Result 872 states and 2702 transitions. [2021-07-09 17:44:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:44:43,956 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 [2021-07-09 17:44:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:43,957 INFO L225 Difference]: With dead ends: 872 [2021-07-09 17:44:43,957 INFO L226 Difference]: Without dead ends: 778 [2021-07-09 17:44:43,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1154.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-07-09 17:44:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 619. [2021-07-09 17:44:43,963 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) [2021-07-09 17:44:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2006 transitions. [2021-07-09 17:44:43,964 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2006 transitions. Word has length 21 [2021-07-09 17:44:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:43,965 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2006 transitions. [2021-07-09 17:44:43,965 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) [2021-07-09 17:44:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2006 transitions. [2021-07-09 17:44:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:43,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:43,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:44,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-07-09 17:44:44,166 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 601 times [2021-07-09 17:44:44,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:44,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655671363] [2021-07-09 17:44:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:44,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:44,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655671363] [2021-07-09 17:44:44,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655671363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:44,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784678855] [2021-07-09 17:44:44,294 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 [2021-07-09 17:44:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:44,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:44:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:44,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:44,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:44,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:44,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,873 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-09 17:44:44,873 INFO L628 ElimStorePlain]: treesize reduction 114, result has 61.7 percent of original size [2021-07-09 17:44:44,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:44,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:44,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:44,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:44,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:44,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,940 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 12 treesize of output 8 [2021-07-09 17:44:44,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:44,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:44,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:44,991 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-09 17:44:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:45,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784678855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:45,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:45,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:44:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990677347] [2021-07-09 17:44:45,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:45,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:45,157 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) [2021-07-09 17:44:45,602 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-09 17:44:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:45,760 INFO L93 Difference]: Finished difference Result 957 states and 2965 transitions. [2021-07-09 17:44:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:44:45,760 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 [2021-07-09 17:44:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:45,762 INFO L225 Difference]: With dead ends: 957 [2021-07-09 17:44:45,762 INFO L226 Difference]: Without dead ends: 910 [2021-07-09 17:44:45,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:44:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-07-09 17:44:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 633. [2021-07-09 17:44:45,769 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) [2021-07-09 17:44:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2075 transitions. [2021-07-09 17:44:45,770 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2075 transitions. Word has length 21 [2021-07-09 17:44:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:45,770 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2075 transitions. [2021-07-09 17:44:45,770 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) [2021-07-09 17:44:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2075 transitions. [2021-07-09 17:44:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:45,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:45,771 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:45,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-07-09 17:44:45,972 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash -893071312, now seen corresponding path program 602 times [2021-07-09 17:44:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:45,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162648023] [2021-07-09 17:44:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:46,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:46,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162648023] [2021-07-09 17:44:46,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162648023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:46,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008246046] [2021-07-09 17:44:46,103 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 [2021-07-09 17:44:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:44:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:46,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:46,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,723 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 [2021-07-09 17:44:46,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:46,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:46,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:46,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:46,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,753 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 25 treesize of output 13 [2021-07-09 17:44:46,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,759 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 18 treesize of output 12 [2021-07-09 17:44:46,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:46,764 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:46,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:46,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:46,880 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-09 17:44:46,881 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-07-09 17:44:46,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:44:46,883 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-09 17:44:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:47,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008246046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:47,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:47,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:44:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645873203] [2021-07-09 17:44:47,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:47,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:47,059 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) [2021-07-09 17:44:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:47,926 INFO L93 Difference]: Finished difference Result 925 states and 2856 transitions. [2021-07-09 17:44:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:44:47,926 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 [2021-07-09 17:44:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:47,928 INFO L225 Difference]: With dead ends: 925 [2021-07-09 17:44:47,928 INFO L226 Difference]: Without dead ends: 856 [2021-07-09 17:44:47,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-07-09 17:44:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 587. [2021-07-09 17:44:47,935 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) [2021-07-09 17:44:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1888 transitions. [2021-07-09 17:44:47,936 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1888 transitions. Word has length 21 [2021-07-09 17:44:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:47,936 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1888 transitions. [2021-07-09 17:44:47,936 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) [2021-07-09 17:44:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1888 transitions. [2021-07-09 17:44:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:47,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:47,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:48,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-07-09 17:44:48,137 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 603 times [2021-07-09 17:44:48,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:48,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099483439] [2021-07-09 17:44:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:48,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:48,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099483439] [2021-07-09 17:44:48,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099483439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:48,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441075676] [2021-07-09 17:44:48,296 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 [2021-07-09 17:44:48,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:44:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:48,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:44:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,781 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 18 treesize of output 8 [2021-07-09 17:44:48,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:48,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:48,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:48,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:48,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:48,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:48,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,892 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-07-09 17:44:48,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:48,894 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-07-09 17:44:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441075676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:48,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:48,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:44:48,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703625938] [2021-07-09 17:44:48,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:48,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:48,982 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) [2021-07-09 17:44:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:49,431 INFO L93 Difference]: Finished difference Result 758 states and 2401 transitions. [2021-07-09 17:44:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:44:49,431 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 [2021-07-09 17:44:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:49,432 INFO L225 Difference]: With dead ends: 758 [2021-07-09 17:44:49,432 INFO L226 Difference]: Without dead ends: 711 [2021-07-09 17:44:49,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-09 17:44:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 612. [2021-07-09 17:44:49,438 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) [2021-07-09 17:44:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1978 transitions. [2021-07-09 17:44:49,439 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1978 transitions. Word has length 21 [2021-07-09 17:44:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1978 transitions. [2021-07-09 17:44:49,440 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) [2021-07-09 17:44:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1978 transitions. [2021-07-09 17:44:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:49,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:49,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:49,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6183,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:49,641 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 604 times [2021-07-09 17:44:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351817152] [2021-07-09 17:44:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:49,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351817152] [2021-07-09 17:44:49,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351817152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048100886] [2021-07-09 17:44:49,771 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 [2021-07-09 17:44:49,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:44:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:50,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,450 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 19 treesize of output 13 [2021-07-09 17:44:50,451 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:50,461 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:50,593 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-09 17:44:50,593 INFO L628 ElimStorePlain]: treesize reduction 155, result has 46.9 percent of original size [2021-07-09 17:44:50,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:50,595 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-07-09 17:44:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:50,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048100886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:50,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:50,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:44:50,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115874049] [2021-07-09 17:44:50,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:50,814 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) [2021-07-09 17:44:51,179 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-07-09 17:44:51,760 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-09 17:44:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:51,968 INFO L93 Difference]: Finished difference Result 809 states and 2536 transitions. [2021-07-09 17:44:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:44:51,968 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 [2021-07-09 17:44:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:51,970 INFO L225 Difference]: With dead ends: 809 [2021-07-09 17:44:51,970 INFO L226 Difference]: Without dead ends: 740 [2021-07-09 17:44:51,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-07-09 17:44:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 605. [2021-07-09 17:44:51,976 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) [2021-07-09 17:44:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1949 transitions. [2021-07-09 17:44:51,977 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1949 transitions. Word has length 21 [2021-07-09 17:44:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:51,977 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1949 transitions. [2021-07-09 17:44:51,977 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) [2021-07-09 17:44:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1949 transitions. [2021-07-09 17:44:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:51,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:51,978 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:52,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6226,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:52,178 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 605 times [2021-07-09 17:44:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:52,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525154792] [2021-07-09 17:44:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:52,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525154792] [2021-07-09 17:44:52,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525154792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:52,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704484180] [2021-07-09 17:44:52,311 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 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 [2021-07-09 17:44:52,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:44:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:44:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,722 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 [2021-07-09 17:44:52,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,728 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 18 treesize of output 1 [2021-07-09 17:44:52,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:52,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,894 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-09 17:44:52,895 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-09 17:44:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:52,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:52,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:52,983 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 18 treesize of output 12 [2021-07-09 17:44:52,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,987 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 12 treesize of output 8 [2021-07-09 17:44:52,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:53,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:53,037 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-09 17:44:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:53,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704484180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:53,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:53,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:44:53,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245335078] [2021-07-09 17:44:53,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:53,197 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) [2021-07-09 17:44:53,654 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-09 17:44:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:53,819 INFO L93 Difference]: Finished difference Result 890 states and 2751 transitions. [2021-07-09 17:44:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:44:53,820 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 [2021-07-09 17:44:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:53,821 INFO L225 Difference]: With dead ends: 890 [2021-07-09 17:44:53,821 INFO L226 Difference]: Without dead ends: 843 [2021-07-09 17:44:53,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 661.4ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:44:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-07-09 17:44:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 614. [2021-07-09 17:44:53,828 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) [2021-07-09 17:44:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1992 transitions. [2021-07-09 17:44:53,829 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1992 transitions. Word has length 21 [2021-07-09 17:44:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:53,829 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1992 transitions. [2021-07-09 17:44:53,829 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) [2021-07-09 17:44:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1992 transitions. [2021-07-09 17:44:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:53,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:53,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:54,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6298 [2021-07-09 17:44:54,031 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 606 times [2021-07-09 17:44:54,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:54,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056520978] [2021-07-09 17:44:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:54,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:54,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056520978] [2021-07-09 17:44:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056520978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854108568] [2021-07-09 17:44:54,177 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 [2021-07-09 17:44:54,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:44:54,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:44:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:54,640 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_180, v_prenex_178], 1=[v_prenex_179, nondet_0]} [2021-07-09 17:44:54,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:54,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,776 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-07-09 17:44:54,776 INFO L628 ElimStorePlain]: treesize reduction 279, result has 33.1 percent of original size [2021-07-09 17:44:54,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:54,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,872 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-07-09 17:44:54,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:54,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:54,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:54,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:54,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:54,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,005 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:44:55,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:44:55,007 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-09 17:44:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:55,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854108568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:55,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:55,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:44:55,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524437994] [2021-07-09 17:44:55,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:55,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:55,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:55,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:55,171 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) [2021-07-09 17:44:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:56,083 INFO L93 Difference]: Finished difference Result 858 states and 2642 transitions. [2021-07-09 17:44:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:44:56,083 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 [2021-07-09 17:44:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:56,084 INFO L225 Difference]: With dead ends: 858 [2021-07-09 17:44:56,084 INFO L226 Difference]: Without dead ends: 789 [2021-07-09 17:44:56,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-07-09 17:44:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 602. [2021-07-09 17:44:56,091 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) [2021-07-09 17:44:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1944 transitions. [2021-07-09 17:44:56,092 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1944 transitions. Word has length 21 [2021-07-09 17:44:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:56,092 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1944 transitions. [2021-07-09 17:44:56,092 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) [2021-07-09 17:44:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1944 transitions. [2021-07-09 17:44:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:56,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:56,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:56,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:56,293 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 607 times [2021-07-09 17:44:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:56,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803635437] [2021-07-09 17:44:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:56,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:56,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803635437] [2021-07-09 17:44:56,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803635437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:56,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381012885] [2021-07-09 17:44:56,413 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 [2021-07-09 17:44:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:44:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:56,711 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-07-09 17:44:57,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:57,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:57,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:57,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,227 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-09 17:44:57,228 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-09 17:44:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:57,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:57,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:57,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:57,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:57,326 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 19 treesize of output 13 [2021-07-09 17:44:57,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,427 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.7 percent of original size [2021-07-09 17:44:57,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:57,429 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-09 17:44:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:57,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381012885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:57,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:57,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:44:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387786359] [2021-07-09 17:44:57,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:44:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:44:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:44:57,608 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) [2021-07-09 17:44:57,845 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:44:58,453 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-09 17:44:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:58,643 INFO L93 Difference]: Finished difference Result 941 states and 2880 transitions. [2021-07-09 17:44:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:44:58,643 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 [2021-07-09 17:44:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:58,644 INFO L225 Difference]: With dead ends: 941 [2021-07-09 17:44:58,644 INFO L226 Difference]: Without dead ends: 847 [2021-07-09 17:44:58,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1100.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-09 17:44:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 620. [2021-07-09 17:44:58,651 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) [2021-07-09 17:44:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2023 transitions. [2021-07-09 17:44:58,652 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2023 transitions. Word has length 21 [2021-07-09 17:44:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:58,652 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2023 transitions. [2021-07-09 17:44:58,652 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) [2021-07-09 17:44:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2023 transitions. [2021-07-09 17:44:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:58,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:58,653 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:58,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6392 [2021-07-09 17:44:58,854 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash -917949072, now seen corresponding path program 608 times [2021-07-09 17:44:58,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:58,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762116096] [2021-07-09 17:44:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:58,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:58,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762116096] [2021-07-09 17:44:58,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762116096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:58,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730577593] [2021-07-09 17:44:58,981 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 [2021-07-09 17:44:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:44:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:59,498 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, v_prenex_189], 1=[v_prenex_188, nondet_0]} [2021-07-09 17:44:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:59,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:59,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,510 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 [2021-07-09 17:44:59,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,652 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-09 17:44:59,652 INFO L628 ElimStorePlain]: treesize reduction 221, result has 39.8 percent of original size [2021-07-09 17:44:59,655 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 5 treesize of output 3 [2021-07-09 17:44:59,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,750 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-07-09 17:44:59,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:44:59,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:59,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:59,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:59,804 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 19 treesize of output 13 [2021-07-09 17:44:59,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:44:59,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:59,883 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:44:59,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:44:59,888 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-09 17:45:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:00,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730577593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:00,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:00,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:00,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660827367] [2021-07-09 17:45:00,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:00,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:00,059 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) [2021-07-09 17:45:00,290 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:45:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:01,135 INFO L93 Difference]: Finished difference Result 1014 states and 3030 transitions. [2021-07-09 17:45:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:45:01,136 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 [2021-07-09 17:45:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:01,137 INFO L225 Difference]: With dead ends: 1014 [2021-07-09 17:45:01,137 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 17:45:01,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1050.8ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 17:45:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 623. [2021-07-09 17:45:01,144 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) [2021-07-09 17:45:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2018 transitions. [2021-07-09 17:45:01,145 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2018 transitions. Word has length 21 [2021-07-09 17:45:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:01,145 INFO L482 AbstractCegarLoop]: Abstraction has 623 states and 2018 transitions. [2021-07-09 17:45:01,145 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) [2021-07-09 17:45:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2018 transitions. [2021-07-09 17:45:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:01,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:01,146 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:01,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6459,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:01,347 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1051616592, now seen corresponding path program 609 times [2021-07-09 17:45:01,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:01,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742418790] [2021-07-09 17:45:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:01,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:01,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742418790] [2021-07-09 17:45:01,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742418790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:01,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449933501] [2021-07-09 17:45:01,462 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 [2021-07-09 17:45:01,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:45:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:45:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:01,950 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_193, v_prenex_194], 1=[nondet_0]} [2021-07-09 17:45:01,953 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 [2021-07-09 17:45:01,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,957 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 [2021-07-09 17:45:01,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:02,008 INFO L628 ElimStorePlain]: treesize reduction 107, result has 28.7 percent of original size [2021-07-09 17:45:02,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-07-09 17:45:02,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:02,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:02,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:02,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:02,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:02,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:30 [2021-07-09 17:45:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:02,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449933501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:02,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:02,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:45:02,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805994226] [2021-07-09 17:45:02,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:02,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:02,090 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) [2021-07-09 17:45:02,318 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:45:02,519 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-09 17:45:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:02,756 INFO L93 Difference]: Finished difference Result 782 states and 2402 transitions. [2021-07-09 17:45:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:45:02,756 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 [2021-07-09 17:45:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:02,757 INFO L225 Difference]: With dead ends: 782 [2021-07-09 17:45:02,757 INFO L226 Difference]: Without dead ends: 728 [2021-07-09 17:45:02,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-09 17:45:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 629. [2021-07-09 17:45:02,764 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) [2021-07-09 17:45:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2025 transitions. [2021-07-09 17:45:02,765 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2025 transitions. Word has length 21 [2021-07-09 17:45:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:02,765 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2025 transitions. [2021-07-09 17:45:02,765 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) [2021-07-09 17:45:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2025 transitions. [2021-07-09 17:45:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:02,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:02,766 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] [2021-07-09 17:45:02,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6521 [2021-07-09 17:45:02,966 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash 671100815, now seen corresponding path program 22 times [2021-07-09 17:45:02,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:02,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911401295] [2021-07-09 17:45:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:03,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911401295] [2021-07-09 17:45:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911401295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299035532] [2021-07-09 17:45:03,062 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 [2021-07-09 17:45:03,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:03,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299035532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:45:03,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208645959] [2021-07-09 17:45:03,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:03,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:03,317 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) [2021-07-09 17:45:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:04,903 INFO L93 Difference]: Finished difference Result 1261 states and 3687 transitions. [2021-07-09 17:45:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:45:04,903 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 [2021-07-09 17:45:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:04,905 INFO L225 Difference]: With dead ends: 1261 [2021-07-09 17:45:04,905 INFO L226 Difference]: Without dead ends: 997 [2021-07-09 17:45:04,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1270.4ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:45:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-07-09 17:45:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 632. [2021-07-09 17:45:04,912 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) [2021-07-09 17:45:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2021 transitions. [2021-07-09 17:45:04,914 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2021 transitions. Word has length 21 [2021-07-09 17:45:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:04,914 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2021 transitions. [2021-07-09 17:45:04,914 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) [2021-07-09 17:45:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2021 transitions. [2021-07-09 17:45:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:04,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:04,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:05,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6556,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:05,115 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 610 times [2021-07-09 17:45:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:05,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595373655] [2021-07-09 17:45:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:05,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595373655] [2021-07-09 17:45:05,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595373655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928107938] [2021-07-09 17:45:05,202 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 [2021-07-09 17:45:05,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:05,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:05,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:05,450 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 18 treesize of output 12 [2021-07-09 17:45:05,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,454 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 5 treesize of output 3 [2021-07-09 17:45:05,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:05,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,459 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 11 treesize of output 7 [2021-07-09 17:45:05,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:05,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:05,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-09 17:45:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:05,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928107938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:05,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:05,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:05,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091929659] [2021-07-09 17:45:05,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:05,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:05,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:05,642 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) [2021-07-09 17:45:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:06,463 INFO L93 Difference]: Finished difference Result 968 states and 2993 transitions. [2021-07-09 17:45:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:45:06,463 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 [2021-07-09 17:45:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:06,464 INFO L225 Difference]: With dead ends: 968 [2021-07-09 17:45:06,464 INFO L226 Difference]: Without dead ends: 852 [2021-07-09 17:45:06,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-09 17:45:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 651. [2021-07-09 17:45:06,471 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) [2021-07-09 17:45:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2096 transitions. [2021-07-09 17:45:06,472 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2096 transitions. Word has length 21 [2021-07-09 17:45:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:06,472 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 2096 transitions. [2021-07-09 17:45:06,472 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) [2021-07-09 17:45:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2096 transitions. [2021-07-09 17:45:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:06,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:06,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6560,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:06,674 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 611 times [2021-07-09 17:45:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511745591] [2021-07-09 17:45:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:06,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:06,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511745591] [2021-07-09 17:45:06,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511745591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364434307] [2021-07-09 17:45:06,782 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 [2021-07-09 17:45:06,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:07,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:07,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:07,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:07,284 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 12 treesize of output 8 [2021-07-09 17:45:07,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:07,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:07,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:07,356 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-07-09 17:45:07,358 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 12 treesize of output 8 [2021-07-09 17:45:07,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:07,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:07,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:07,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-07-09 17:45:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364434307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:07,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420627010] [2021-07-09 17:45:07,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:07,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:07,518 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) [2021-07-09 17:45:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:08,586 INFO L93 Difference]: Finished difference Result 908 states and 2840 transitions. [2021-07-09 17:45:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:45:08,587 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 [2021-07-09 17:45:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:08,588 INFO L225 Difference]: With dead ends: 908 [2021-07-09 17:45:08,588 INFO L226 Difference]: Without dead ends: 839 [2021-07-09 17:45:08,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 980.2ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-07-09 17:45:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 658. [2021-07-09 17:45:08,595 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) [2021-07-09 17:45:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2125 transitions. [2021-07-09 17:45:08,596 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2125 transitions. Word has length 21 [2021-07-09 17:45:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:08,596 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2125 transitions. [2021-07-09 17:45:08,596 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) [2021-07-09 17:45:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2125 transitions. [2021-07-09 17:45:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:08,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:08,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:08,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6576 [2021-07-09 17:45:08,798 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 612 times [2021-07-09 17:45:08,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:08,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632343103] [2021-07-09 17:45:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:08,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632343103] [2021-07-09 17:45:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632343103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713218781] [2021-07-09 17:45:08,894 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 [2021-07-09 17:45:09,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:09,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:45:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:09,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:09,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:09,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,139 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 18 treesize of output 12 [2021-07-09 17:45:09,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:09,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,146 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 17 treesize of output 11 [2021-07-09 17:45:09,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:09,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:09,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:09,157 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:09,161 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,164 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 18 treesize of output 12 [2021-07-09 17:45:09,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:09,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:09,266 INFO L628 ElimStorePlain]: treesize reduction 64, result has 62.6 percent of original size [2021-07-09 17:45:09,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:09,267 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:401, output treesize:107 [2021-07-09 17:45:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:09,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713218781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:09,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:09,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:45:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227786012] [2021-07-09 17:45:09,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:09,434 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) [2021-07-09 17:45:09,858 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:45:10,021 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 17:45:10,181 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-09 17:45:10,361 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-09 17:45:10,512 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:45:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:10,576 INFO L93 Difference]: Finished difference Result 1121 states and 3412 transitions. [2021-07-09 17:45:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:45:10,576 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 [2021-07-09 17:45:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:10,578 INFO L225 Difference]: With dead ends: 1121 [2021-07-09 17:45:10,578 INFO L226 Difference]: Without dead ends: 980 [2021-07-09 17:45:10,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1088.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:45:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-07-09 17:45:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 672. [2021-07-09 17:45:10,586 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) [2021-07-09 17:45:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2190 transitions. [2021-07-09 17:45:10,587 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2190 transitions. Word has length 21 [2021-07-09 17:45:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:10,587 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2190 transitions. [2021-07-09 17:45:10,587 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) [2021-07-09 17:45:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2190 transitions. [2021-07-09 17:45:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:10,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:10,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:10,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6623,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:10,788 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:10,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 613 times [2021-07-09 17:45:10,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741368515] [2021-07-09 17:45:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:10,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:10,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741368515] [2021-07-09 17:45:10,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741368515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:10,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588132478] [2021-07-09 17:45:10,929 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 [2021-07-09 17:45:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:11,197 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 18 treesize of output 12 [2021-07-09 17:45:11,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:11,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:11,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:11,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:11,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:11,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:11,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:11,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:11,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-07-09 17:45:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:11,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588132478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:11,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:11,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 17:45:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329501804] [2021-07-09 17:45:11,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:45:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:11,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:45:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:11,384 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) [2021-07-09 17:45:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:12,253 INFO L93 Difference]: Finished difference Result 991 states and 3102 transitions. [2021-07-09 17:45:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:45:12,253 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 [2021-07-09 17:45:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:12,254 INFO L225 Difference]: With dead ends: 991 [2021-07-09 17:45:12,254 INFO L226 Difference]: Without dead ends: 875 [2021-07-09 17:45:12,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:45:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-09 17:45:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 692. [2021-07-09 17:45:12,262 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) [2021-07-09 17:45:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-09 17:45:12,264 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-09 17:45:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:12,264 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-09 17:45:12,264 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) [2021-07-09 17:45:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-09 17:45:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:12,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:12,265 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:12,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6642 [2021-07-09 17:45:12,466 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 614 times [2021-07-09 17:45:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:12,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194550361] [2021-07-09 17:45:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:12,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:12,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194550361] [2021-07-09 17:45:12,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194550361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:12,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266952308] [2021-07-09 17:45:12,606 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 [2021-07-09 17:45:12,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:45:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,143 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-07-09 17:45:13,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,166 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,171 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 12 [2021-07-09 17:45:13,171 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,178 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 25 treesize of output 13 [2021-07-09 17:45:13,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,184 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 17 treesize of output 11 [2021-07-09 17:45:13,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,190 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:13,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:13,374 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 17:45:13,375 INFO L628 ElimStorePlain]: treesize reduction 79, result has 70.4 percent of original size [2021-07-09 17:45:13,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:13,377 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:108 [2021-07-09 17:45:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:13,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266952308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:13,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:13,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:45:13,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124114756] [2021-07-09 17:45:13,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:45:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:45:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:45:13,591 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) [2021-07-09 17:45:14,007 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 17:45:14,166 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:45:14,327 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-09 17:45:14,475 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-09 17:45:14,619 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 17:45:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:14,676 INFO L93 Difference]: Finished difference Result 940 states and 2947 transitions. [2021-07-09 17:45:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:45:14,677 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 [2021-07-09 17:45:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:14,678 INFO L225 Difference]: With dead ends: 940 [2021-07-09 17:45:14,678 INFO L226 Difference]: Without dead ends: 846 [2021-07-09 17:45:14,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-07-09 17:45:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 692. [2021-07-09 17:45:14,686 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) [2021-07-09 17:45:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-09 17:45:14,687 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-09 17:45:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:14,687 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-09 17:45:14,687 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) [2021-07-09 17:45:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-09 17:45:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:14,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:14,688 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:14,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:14,889 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 615 times [2021-07-09 17:45:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710508557] [2021-07-09 17:45:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:15,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710508557] [2021-07-09 17:45:15,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710508557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903698134] [2021-07-09 17:45:15,023 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 [2021-07-09 17:45:15,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:45:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:45:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,645 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 23 treesize of output 1 [2021-07-09 17:45:15,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:15,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:15,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,662 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 1 [2021-07-09 17:45:15,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:15,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:15,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:15,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:15,682 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,686 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 24 treesize of output 12 [2021-07-09 17:45:15,687 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:15,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,705 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 11 treesize of output 7 [2021-07-09 17:45:15,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:15,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:15,711 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,836 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 17:45:15,836 INFO L628 ElimStorePlain]: treesize reduction 39, result has 79.0 percent of original size [2021-07-09 17:45:15,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:15,838 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-09 17:45:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903698134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:16,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:16,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:45:16,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63841433] [2021-07-09 17:45:16,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:45:16,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:45:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:45:16,005 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) [2021-07-09 17:45:16,706 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 17:45:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:16,984 INFO L93 Difference]: Finished difference Result 1079 states and 3345 transitions. [2021-07-09 17:45:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:45:16,984 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 [2021-07-09 17:45:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:16,986 INFO L225 Difference]: With dead ends: 1079 [2021-07-09 17:45:16,986 INFO L226 Difference]: Without dead ends: 985 [2021-07-09 17:45:16,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-09 17:45:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2021-07-09 17:45:16,996 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) [2021-07-09 17:45:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2338 transitions. [2021-07-09 17:45:16,998 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2338 transitions. Word has length 21 [2021-07-09 17:45:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:16,998 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2338 transitions. [2021-07-09 17:45:16,998 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) [2021-07-09 17:45:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2338 transitions. [2021-07-09 17:45:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:16,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:16,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:17,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6729 [2021-07-09 17:45:17,199 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 616 times [2021-07-09 17:45:17,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:17,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641922510] [2021-07-09 17:45:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:17,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:17,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641922510] [2021-07-09 17:45:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641922510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:17,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254017896] [2021-07-09 17:45:17,329 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 [2021-07-09 17:45:17,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:17,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,798 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 17 treesize of output 11 [2021-07-09 17:45:17,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:17,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:17,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,814 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 18 treesize of output 12 [2021-07-09 17:45:17,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,819 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 24 treesize of output 12 [2021-07-09 17:45:17,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:17,822 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 12 treesize of output 8 [2021-07-09 17:45:17,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:17,906 INFO L628 ElimStorePlain]: treesize reduction 44, result has 69.2 percent of original size [2021-07-09 17:45:17,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:17,908 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-07-09 17:45:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254017896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:18,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:18,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882543944] [2021-07-09 17:45:18,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:18,075 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) [2021-07-09 17:45:18,478 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-07-09 17:45:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:19,126 INFO L93 Difference]: Finished difference Result 970 states and 3035 transitions. [2021-07-09 17:45:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:45:19,126 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 [2021-07-09 17:45:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:19,128 INFO L225 Difference]: With dead ends: 970 [2021-07-09 17:45:19,128 INFO L226 Difference]: Without dead ends: 901 [2021-07-09 17:45:19,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1049.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:45:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-09 17:45:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 692. [2021-07-09 17:45:19,136 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) [2021-07-09 17:45:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-07-09 17:45:19,137 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-07-09 17:45:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:19,137 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-07-09 17:45:19,137 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) [2021-07-09 17:45:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-07-09 17:45:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:19,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:19,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:19,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6847 [2021-07-09 17:45:19,339 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:19,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 617 times [2021-07-09 17:45:19,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:19,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005388148] [2021-07-09 17:45:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:19,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:19,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005388148] [2021-07-09 17:45:19,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005388148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:19,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913220187] [2021-07-09 17:45:19,485 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 [2021-07-09 17:45:19,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:19,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:19,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:45:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:19,915 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 13 treesize of output 9 [2021-07-09 17:45:19,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:19,919 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 12 treesize of output 8 [2021-07-09 17:45:19,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:19,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,924 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 [2021-07-09 17:45:19,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,928 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 12 treesize of output 1 [2021-07-09 17:45:19,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:19,932 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 19 treesize of output 9 [2021-07-09 17:45:19,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:19,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:19,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:20,015 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-07-09 17:45:20,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:20,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-07-09 17:45:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913220187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:20,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:20,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:45:20,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568084021] [2021-07-09 17:45:20,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:45:20,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:20,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:45:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:45:20,100 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) [2021-07-09 17:45:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:20,694 INFO L93 Difference]: Finished difference Result 872 states and 2822 transitions. [2021-07-09 17:45:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:45:20,694 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 [2021-07-09 17:45:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:20,696 INFO L225 Difference]: With dead ends: 872 [2021-07-09 17:45:20,696 INFO L226 Difference]: Without dead ends: 825 [2021-07-09 17:45:20,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:45:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-09 17:45:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 710. [2021-07-09 17:45:20,703 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) [2021-07-09 17:45:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-07-09 17:45:20,704 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-07-09 17:45:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:20,705 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-07-09 17:45:20,705 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) [2021-07-09 17:45:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-07-09 17:45:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:20,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:20,706 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:20,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6897,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:20,906 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 618 times [2021-07-09 17:45:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:20,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55286237] [2021-07-09 17:45:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:21,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:21,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55286237] [2021-07-09 17:45:21,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55286237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188531517] [2021-07-09 17:45:21,025 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 [2021-07-09 17:45:21,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:21,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:45:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,548 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 17 treesize of output 8 [2021-07-09 17:45:21,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:21,581 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:21,760 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-09 17:45:21,760 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-07-09 17:45:21,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:21,762 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-07-09 17:45:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:21,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188531517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:21,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:21,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:45:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166135041] [2021-07-09 17:45:21,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:45:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:45:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:45:21,966 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) [2021-07-09 17:45:22,365 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:45:22,525 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 17:45:22,685 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-09 17:45:22,874 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-09 17:45:23,020 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:45:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:23,098 INFO L93 Difference]: Finished difference Result 1096 states and 3417 transitions. [2021-07-09 17:45:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:45:23,098 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 [2021-07-09 17:45:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:23,100 INFO L225 Difference]: With dead ends: 1096 [2021-07-09 17:45:23,100 INFO L226 Difference]: Without dead ends: 955 [2021-07-09 17:45:23,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1127.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-09 17:45:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 710. [2021-07-09 17:45:23,108 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) [2021-07-09 17:45:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-07-09 17:45:23,109 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-07-09 17:45:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:23,110 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-07-09 17:45:23,110 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) [2021-07-09 17:45:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-07-09 17:45:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:23,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:23,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:23,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6932,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:23,311 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 619 times [2021-07-09 17:45:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:23,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124894260] [2021-07-09 17:45:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:23,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:23,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124894260] [2021-07-09 17:45:23,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124894260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:23,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62242044] [2021-07-09 17:45:23,440 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 [2021-07-09 17:45:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:23,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:23,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:23,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:23,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:23,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:23,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:24,061 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-09 17:45:24,061 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-07-09 17:45:24,065 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 12 treesize of output 8 [2021-07-09 17:45:24,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:24,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:24,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:24,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:24,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:24,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:24,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:24,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:24,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:24,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:24,198 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-09 17:45:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:24,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62242044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:24,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:24,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473557068] [2021-07-09 17:45:24,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:24,449 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) [2021-07-09 17:45:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:25,292 INFO L93 Difference]: Finished difference Result 1025 states and 3210 transitions. [2021-07-09 17:45:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:45:25,293 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 [2021-07-09 17:45:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:25,295 INFO L225 Difference]: With dead ends: 1025 [2021-07-09 17:45:25,295 INFO L226 Difference]: Without dead ends: 956 [2021-07-09 17:45:25,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:45:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-09 17:45:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 719. [2021-07-09 17:45:25,302 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) [2021-07-09 17:45:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2373 transitions. [2021-07-09 17:45:25,304 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2373 transitions. Word has length 21 [2021-07-09 17:45:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:25,304 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2373 transitions. [2021-07-09 17:45:25,304 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) [2021-07-09 17:45:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2373 transitions. [2021-07-09 17:45:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:25,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:25,305 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:25,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7006,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:25,505 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 620 times [2021-07-09 17:45:25,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:25,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169721933] [2021-07-09 17:45:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:25,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:25,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169721933] [2021-07-09 17:45:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169721933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:25,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471492116] [2021-07-09 17:45:25,649 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 [2021-07-09 17:45:25,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:25,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:26,111 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_212, v_prenex_213], 1=[nondet_0, v_prenex_214]} [2021-07-09 17:45:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:26,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:26,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:26,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,268 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 17:45:26,269 INFO L628 ElimStorePlain]: treesize reduction 217, result has 40.9 percent of original size [2021-07-09 17:45:26,272 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 5 treesize of output 3 [2021-07-09 17:45:26,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,371 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.6 percent of original size [2021-07-09 17:45:26,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:26,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:26,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:26,379 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,457 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 17:45:26,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:26,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:26,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:26,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:26,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:26,500 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-09 17:45:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:26,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471492116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:26,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:26,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63656801] [2021-07-09 17:45:26,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:26,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:26,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:26,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:26,666 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) [2021-07-09 17:45:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:27,572 INFO L93 Difference]: Finished difference Result 1026 states and 3191 transitions. [2021-07-09 17:45:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:45:27,572 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 [2021-07-09 17:45:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:27,573 INFO L225 Difference]: With dead ends: 1026 [2021-07-09 17:45:27,573 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 17:45:27,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:45:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 17:45:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2021-07-09 17:45:27,581 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) [2021-07-09 17:45:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-07-09 17:45:27,582 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-07-09 17:45:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:27,582 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-07-09 17:45:27,582 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) [2021-07-09 17:45:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-07-09 17:45:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:27,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:27,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:27,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7068 [2021-07-09 17:45:27,784 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 621 times [2021-07-09 17:45:27,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:27,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153831205] [2021-07-09 17:45:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:27,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:27,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153831205] [2021-07-09 17:45:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153831205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:27,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882689744] [2021-07-09 17:45:27,914 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 [2021-07-09 17:45:28,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:45:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:28,232 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 17:45:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:28,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:28,578 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 25 treesize of output 13 [2021-07-09 17:45:28,579 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:28,716 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-09 17:45:28,716 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-07-09 17:45:28,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:28,718 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-07-09 17:45:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882689744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:29,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:29,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876942992] [2021-07-09 17:45:29,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:29,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:29,004 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) [2021-07-09 17:45:29,268 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:45:29,548 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-09 17:45:29,718 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-07-09 17:45:29,848 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-09 17:45:29,997 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-07-09 17:45:30,139 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-09 17:45:30,305 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-09 17:45:30,463 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-07-09 17:45:30,625 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-09 17:45:30,767 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-09 17:45:30,897 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-09 17:45:31,028 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-09 17:45:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:31,099 INFO L93 Difference]: Finished difference Result 1124 states and 3466 transitions. [2021-07-09 17:45:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:45:31,099 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 [2021-07-09 17:45:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:31,101 INFO L225 Difference]: With dead ends: 1124 [2021-07-09 17:45:31,101 INFO L226 Difference]: Without dead ends: 986 [2021-07-09 17:45:31,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2233.0ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:45:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-09 17:45:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 751. [2021-07-09 17:45:31,109 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) [2021-07-09 17:45:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2485 transitions. [2021-07-09 17:45:31,110 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2485 transitions. Word has length 21 [2021-07-09 17:45:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:31,111 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2485 transitions. [2021-07-09 17:45:31,111 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) [2021-07-09 17:45:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2485 transitions. [2021-07-09 17:45:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:31,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:31,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:31,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7119,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:31,312 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 622 times [2021-07-09 17:45:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:31,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844075352] [2021-07-09 17:45:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:31,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844075352] [2021-07-09 17:45:31,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844075352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993600376] [2021-07-09 17:45:31,438 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 [2021-07-09 17:45:31,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:31,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:31,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:31,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:32,077 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-07-09 17:45:32,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:32,079 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-07-09 17:45:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:32,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993600376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:32,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:32,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:32,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500905157] [2021-07-09 17:45:32,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:32,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:32,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:32,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:32,260 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) [2021-07-09 17:45:32,549 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:45:32,899 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-07-09 17:45:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:33,573 INFO L93 Difference]: Finished difference Result 1032 states and 3203 transitions. [2021-07-09 17:45:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:45:33,574 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 [2021-07-09 17:45:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:33,575 INFO L225 Difference]: With dead ends: 1032 [2021-07-09 17:45:33,576 INFO L226 Difference]: Without dead ends: 963 [2021-07-09 17:45:33,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1298.3ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:45:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-09 17:45:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 742. [2021-07-09 17:45:33,584 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) [2021-07-09 17:45:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2442 transitions. [2021-07-09 17:45:33,585 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2442 transitions. Word has length 21 [2021-07-09 17:45:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:33,585 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2442 transitions. [2021-07-09 17:45:33,585 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) [2021-07-09 17:45:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2442 transitions. [2021-07-09 17:45:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:33,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:33,586 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:33,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7195,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:33,787 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 623 times [2021-07-09 17:45:33,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:33,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965350609] [2021-07-09 17:45:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:33,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:33,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965350609] [2021-07-09 17:45:33,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965350609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:33,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655886228] [2021-07-09 17:45:33,907 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 [2021-07-09 17:45:34,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,519 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 [2021-07-09 17:45:34,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:34,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:34,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:34,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:34,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:34,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:34,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,551 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 18 treesize of output 1 [2021-07-09 17:45:34,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:34,556 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:34,664 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-09 17:45:34,665 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-07-09 17:45:34,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:34,667 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-07-09 17:45:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:34,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655886228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:34,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:34,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:34,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037363808] [2021-07-09 17:45:34,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:34,843 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) [2021-07-09 17:45:35,121 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:45:35,329 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-09 17:45:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:36,125 INFO L93 Difference]: Finished difference Result 995 states and 3138 transitions. [2021-07-09 17:45:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:45:36,126 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 [2021-07-09 17:45:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:36,127 INFO L225 Difference]: With dead ends: 995 [2021-07-09 17:45:36,127 INFO L226 Difference]: Without dead ends: 926 [2021-07-09 17:45:36,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-07-09 17:45:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 733. [2021-07-09 17:45:36,135 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) [2021-07-09 17:45:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-07-09 17:45:36,136 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-07-09 17:45:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:36,136 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-07-09 17:45:36,137 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) [2021-07-09 17:45:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-07-09 17:45:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:36,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:36,137 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:36,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7249,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:36,338 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 624 times [2021-07-09 17:45:36,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:36,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807294847] [2021-07-09 17:45:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:36,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:36,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807294847] [2021-07-09 17:45:36,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807294847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:36,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552003684] [2021-07-09 17:45:36,459 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 [2021-07-09 17:45:36,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,043 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 11 treesize of output 7 [2021-07-09 17:45:37,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,048 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 24 treesize of output 1 [2021-07-09 17:45:37,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:37,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:37,152 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.6 percent of original size [2021-07-09 17:45:37,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:37,154 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-07-09 17:45:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:37,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552003684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:37,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:37,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:37,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354376174] [2021-07-09 17:45:37,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:37,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:37,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:37,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:37,281 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) [2021-07-09 17:45:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:38,191 INFO L93 Difference]: Finished difference Result 952 states and 3054 transitions. [2021-07-09 17:45:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:45:38,191 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 [2021-07-09 17:45:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:38,193 INFO L225 Difference]: With dead ends: 952 [2021-07-09 17:45:38,193 INFO L226 Difference]: Without dead ends: 883 [2021-07-09 17:45:38,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 890.8ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:45:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-07-09 17:45:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 739. [2021-07-09 17:45:38,201 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) [2021-07-09 17:45:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-07-09 17:45:38,202 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-07-09 17:45:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:38,202 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-07-09 17:45:38,202 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) [2021-07-09 17:45:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-07-09 17:45:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:38,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:38,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:38,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7286,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:38,404 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 625 times [2021-07-09 17:45:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:38,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251101520] [2021-07-09 17:45:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:38,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251101520] [2021-07-09 17:45:38,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251101520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086092495] [2021-07-09 17:45:38,527 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 [2021-07-09 17:45:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:39,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,004 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 25 treesize of output 13 [2021-07-09 17:45:39,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:39,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,015 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 11 treesize of output 7 [2021-07-09 17:45:39,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:39,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:39,026 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,032 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 12 treesize of output 8 [2021-07-09 17:45:39,032 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:39,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:39,043 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:39,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:39,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:39,105 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-07-09 17:45:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086092495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:39,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:39,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:39,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359267909] [2021-07-09 17:45:39,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:39,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:39,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:39,318 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) [2021-07-09 17:45:39,928 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-09 17:45:40,296 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-09 17:45:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:40,486 INFO L93 Difference]: Finished difference Result 965 states and 3081 transitions. [2021-07-09 17:45:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:45:40,486 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 [2021-07-09 17:45:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:40,488 INFO L225 Difference]: With dead ends: 965 [2021-07-09 17:45:40,488 INFO L226 Difference]: Without dead ends: 896 [2021-07-09 17:45:40,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1208.2ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:45:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-09 17:45:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-07-09 17:45:40,496 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) [2021-07-09 17:45:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-07-09 17:45:40,497 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-07-09 17:45:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:40,497 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-07-09 17:45:40,497 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) [2021-07-09 17:45:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-07-09 17:45:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:40,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:40,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:40,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7370 [2021-07-09 17:45:40,699 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 626 times [2021-07-09 17:45:40,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:40,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842119138] [2021-07-09 17:45:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:40,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842119138] [2021-07-09 17:45:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842119138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479235018] [2021-07-09 17:45:40,825 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 [2021-07-09 17:45:40,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,419 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 23 treesize of output 1 [2021-07-09 17:45:41,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,446 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 17 treesize of output 11 [2021-07-09 17:45:41,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,453 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:41,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,462 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 12 treesize of output 1 [2021-07-09 17:45:41,462 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,467 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 18 treesize of output 1 [2021-07-09 17:45:41,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:41,471 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:41,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:41,607 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:45:41,608 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.2 percent of original size [2021-07-09 17:45:41,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:41,610 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-09 17:45:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479235018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:41,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:41,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:41,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247531424] [2021-07-09 17:45:41,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:41,857 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) [2021-07-09 17:45:42,929 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-09 17:45:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:43,394 INFO L93 Difference]: Finished difference Result 1143 states and 3515 transitions. [2021-07-09 17:45:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:45:43,394 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 [2021-07-09 17:45:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:43,396 INFO L225 Difference]: With dead ends: 1143 [2021-07-09 17:45:43,396 INFO L226 Difference]: Without dead ends: 1005 [2021-07-09 17:45:43,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1487.6ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:45:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-09 17:45:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 748. [2021-07-09 17:45:43,411 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) [2021-07-09 17:45:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2470 transitions. [2021-07-09 17:45:43,413 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2470 transitions. Word has length 21 [2021-07-09 17:45:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:43,413 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2470 transitions. [2021-07-09 17:45:43,413 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) [2021-07-09 17:45:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2470 transitions. [2021-07-09 17:45:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:43,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:43,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:43,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7410 [2021-07-09 17:45:43,615 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 627 times [2021-07-09 17:45:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:43,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161028057] [2021-07-09 17:45:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:43,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:43,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161028057] [2021-07-09 17:45:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161028057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:43,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453915455] [2021-07-09 17:45:43,740 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 [2021-07-09 17:45:43,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:45:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:43,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:44,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:44,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,280 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 13 treesize of output 9 [2021-07-09 17:45:44,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:44,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:44,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,320 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,326 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:44,331 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:44,334 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 25 treesize of output 13 [2021-07-09 17:45:44,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:44,446 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-09 17:45:44,446 INFO L628 ElimStorePlain]: treesize reduction 59, result has 69.1 percent of original size [2021-07-09 17:45:44,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:44,449 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-09 17:45:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453915455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-07-09 17:45:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949741518] [2021-07-09 17:45:44,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:44,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:44,637 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) [2021-07-09 17:45:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:45,552 INFO L93 Difference]: Finished difference Result 1014 states and 3187 transitions. [2021-07-09 17:45:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:45:45,553 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 [2021-07-09 17:45:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:45,555 INFO L225 Difference]: With dead ends: 1014 [2021-07-09 17:45:45,555 INFO L226 Difference]: Without dead ends: 945 [2021-07-09 17:45:45,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:45:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-09 17:45:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 730. [2021-07-09 17:45:45,563 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) [2021-07-09 17:45:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2393 transitions. [2021-07-09 17:45:45,564 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2393 transitions. Word has length 21 [2021-07-09 17:45:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:45,564 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2393 transitions. [2021-07-09 17:45:45,564 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) [2021-07-09 17:45:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2393 transitions. [2021-07-09 17:45:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:45,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:45,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:45,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7528 [2021-07-09 17:45:45,765 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 628 times [2021-07-09 17:45:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:45,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938528350] [2021-07-09 17:45:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:45,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:45,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938528350] [2021-07-09 17:45:45,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938528350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:45,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917659136] [2021-07-09 17:45:45,898 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 [2021-07-09 17:45:46,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:46,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:46,225 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 17:45:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,664 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 11 treesize of output 7 [2021-07-09 17:45:46,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,686 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 18 treesize of output 8 [2021-07-09 17:45:46,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,691 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 23 treesize of output 1 [2021-07-09 17:45:46,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,697 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:46,702 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:46,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:46,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:46,849 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:45:46,849 INFO L628 ElimStorePlain]: treesize reduction 79, result has 65.0 percent of original size [2021-07-09 17:45:46,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:46,851 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-07-09 17:45:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:47,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917659136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:47,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:47,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005102704] [2021-07-09 17:45:47,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:47,115 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) [2021-07-09 17:45:47,394 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 17:45:48,257 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-09 17:45:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:48,931 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-07-09 17:45:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:45:48,931 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 [2021-07-09 17:45:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:48,933 INFO L225 Difference]: With dead ends: 1141 [2021-07-09 17:45:48,933 INFO L226 Difference]: Without dead ends: 1003 [2021-07-09 17:45:48,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1907.8ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:45:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-07-09 17:45:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 748. [2021-07-09 17:45:48,942 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) [2021-07-09 17:45:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2472 transitions. [2021-07-09 17:45:48,943 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2472 transitions. Word has length 21 [2021-07-09 17:45:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:48,943 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2472 transitions. [2021-07-09 17:45:48,943 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) [2021-07-09 17:45:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2472 transitions. [2021-07-09 17:45:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:48,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:48,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7585,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:49,145 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 629 times [2021-07-09 17:45:49,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:49,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531114824] [2021-07-09 17:45:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:49,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531114824] [2021-07-09 17:45:49,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531114824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694128315] [2021-07-09 17:45:49,270 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 [2021-07-09 17:45:49,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:49,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,855 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 18 treesize of output 12 [2021-07-09 17:45:49,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,864 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 [2021-07-09 17:45:49,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:49,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:49,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,896 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 5 treesize of output 3 [2021-07-09 17:45:49,897 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:49,901 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:49,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:49,905 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:50,015 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-09 17:45:50,016 INFO L628 ElimStorePlain]: treesize reduction 57, result has 69.8 percent of original size [2021-07-09 17:45:50,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:50,018 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-07-09 17:45:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694128315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:50,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:50,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:45:50,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280782160] [2021-07-09 17:45:50,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:45:50,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:45:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:45:50,198 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) [2021-07-09 17:45:50,449 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 17:45:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:51,355 INFO L93 Difference]: Finished difference Result 1164 states and 3546 transitions. [2021-07-09 17:45:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:45:51,356 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 [2021-07-09 17:45:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:51,358 INFO L225 Difference]: With dead ends: 1164 [2021-07-09 17:45:51,358 INFO L226 Difference]: Without dead ends: 1080 [2021-07-09 17:45:51,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1185.3ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-07-09 17:45:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 751. [2021-07-09 17:45:51,367 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) [2021-07-09 17:45:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2467 transitions. [2021-07-09 17:45:51,368 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2467 transitions. Word has length 21 [2021-07-09 17:45:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:51,368 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2467 transitions. [2021-07-09 17:45:51,368 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) [2021-07-09 17:45:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2467 transitions. [2021-07-09 17:45:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:51,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:51,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:51,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7701,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:51,570 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 630 times [2021-07-09 17:45:51,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:51,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338637387] [2021-07-09 17:45:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:51,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338637387] [2021-07-09 17:45:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338637387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800505595] [2021-07-09 17:45:51,713 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 [2021-07-09 17:45:51,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:45:51,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:51,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:52,025 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 [2021-07-09 17:45:52,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:52,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:52,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:52,031 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 18 treesize of output 12 [2021-07-09 17:45:52,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:52,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:52,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:52,037 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 11 treesize of output 7 [2021-07-09 17:45:52,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:52,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:52,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:52,059 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-09 17:45:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:52,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800505595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:52,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:52,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:45:52,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176350592] [2021-07-09 17:45:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:45:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:45:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:45:52,276 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) [2021-07-09 17:45:53,387 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-07-09 17:45:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:53,447 INFO L93 Difference]: Finished difference Result 1118 states and 3569 transitions. [2021-07-09 17:45:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:45:53,447 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 [2021-07-09 17:45:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:53,449 INFO L225 Difference]: With dead ends: 1118 [2021-07-09 17:45:53,449 INFO L226 Difference]: Without dead ends: 1042 [2021-07-09 17:45:53,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1093.4ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:45:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-09 17:45:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 721. [2021-07-09 17:45:53,458 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) [2021-07-09 17:45:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2366 transitions. [2021-07-09 17:45:53,460 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2366 transitions. Word has length 21 [2021-07-09 17:45:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:53,460 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2366 transitions. [2021-07-09 17:45:53,460 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) [2021-07-09 17:45:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2366 transitions. [2021-07-09 17:45:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:53,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:53,461 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:53,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:53,661 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 631 times [2021-07-09 17:45:53,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:53,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292747774] [2021-07-09 17:45:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:53,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292747774] [2021-07-09 17:45:53,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292747774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941895551] [2021-07-09 17:45:53,785 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 [2021-07-09 17:45:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:54,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:54,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,361 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 25 treesize of output 13 [2021-07-09 17:45:54,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:54,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,497 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 17:45:54,497 INFO L628 ElimStorePlain]: treesize reduction 164, result has 45.7 percent of original size [2021-07-09 17:45:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:54,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:54,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:54,556 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 18 treesize of output 12 [2021-07-09 17:45:54,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:54,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:54,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:54,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:54,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-07-09 17:45:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941895551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:54,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:54,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-09 17:45:54,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782598274] [2021-07-09 17:45:54,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:45:54,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:45:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:45:54,893 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) [2021-07-09 17:45:55,210 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-09 17:45:55,419 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-09 17:45:55,605 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 17:45:55,811 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:45:56,038 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-09 17:45:56,208 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 17:45:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:56,305 INFO L93 Difference]: Finished difference Result 1233 states and 3826 transitions. [2021-07-09 17:45:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:45:56,305 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 [2021-07-09 17:45:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:56,307 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 17:45:56,307 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 17:45:56,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1466.9ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:45:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 17:45:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 748. [2021-07-09 17:45:56,323 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) [2021-07-09 17:45:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2481 transitions. [2021-07-09 17:45:56,324 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2481 transitions. Word has length 21 [2021-07-09 17:45:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:56,324 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2481 transitions. [2021-07-09 17:45:56,324 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) [2021-07-09 17:45:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2481 transitions. [2021-07-09 17:45:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:56,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:56,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:56,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7774 [2021-07-09 17:45:56,526 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 632 times [2021-07-09 17:45:56,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:56,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036650393] [2021-07-09 17:45:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:56,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036650393] [2021-07-09 17:45:56,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036650393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328784892] [2021-07-09 17:45:56,639 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 [2021-07-09 17:45:56,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:56,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:45:56,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:57,220 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_241, v_prenex_243], 1=[v_prenex_242, nondet_0]} [2021-07-09 17:45:57,226 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 13 treesize of output 9 [2021-07-09 17:45:57,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,232 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 [2021-07-09 17:45:57,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:57,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,374 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 17:45:57,375 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-07-09 17:45:57,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:45:57,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,486 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-09 17:45:57,486 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-07-09 17:45:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:57,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:57,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:57,539 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 19 treesize of output 13 [2021-07-09 17:45:57,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:45:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:45:57,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:57,617 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:45:57,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:45:57,619 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-07-09 17:45:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328784892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:57,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:57,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-09 17:45:57,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38158129] [2021-07-09 17:45:57,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:45:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:45:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:45:57,793 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) [2021-07-09 17:45:58,087 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:45:59,069 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-09 17:45:59,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-09 17:45:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:59,519 INFO L93 Difference]: Finished difference Result 1339 states and 4052 transitions. [2021-07-09 17:45:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:45:59,519 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 [2021-07-09 17:45:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:59,521 INFO L225 Difference]: With dead ends: 1339 [2021-07-09 17:45:59,521 INFO L226 Difference]: Without dead ends: 1255 [2021-07-09 17:45:59,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:45:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-09 17:45:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 755. [2021-07-09 17:45:59,531 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) [2021-07-09 17:45:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2486 transitions. [2021-07-09 17:45:59,532 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2486 transitions. Word has length 21 [2021-07-09 17:45:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:59,532 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2486 transitions. [2021-07-09 17:45:59,532 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) [2021-07-09 17:45:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2486 transitions. [2021-07-09 17:45:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:45:59,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:59,533 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:59,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7835 [2021-07-09 17:45:59,734 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 633 times [2021-07-09 17:45:59,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:59,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729861818] [2021-07-09 17:45:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:59,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729861818] [2021-07-09 17:45:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729861818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:59,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293779838] [2021-07-09 17:45:59,870 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 [2021-07-09 17:45:59,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:45:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:46:00,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:00,197 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 12 treesize of output 8 [2021-07-09 17:46:00,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:00,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:00,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:00,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:00,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:00,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:00,230 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-09 17:46:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:00,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293779838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:00,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:00,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:46:00,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224945090] [2021-07-09 17:46:00,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:00,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:00,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:00,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:00,439 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) [2021-07-09 17:46:01,841 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 17:46:02,235 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-09 17:46:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:02,335 INFO L93 Difference]: Finished difference Result 1546 states and 4721 transitions. [2021-07-09 17:46:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:46:02,335 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 [2021-07-09 17:46:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:02,337 INFO L225 Difference]: With dead ends: 1546 [2021-07-09 17:46:02,337 INFO L226 Difference]: Without dead ends: 1455 [2021-07-09 17:46:02,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1685.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:46:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-09 17:46:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 748. [2021-07-09 17:46:02,349 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) [2021-07-09 17:46:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2459 transitions. [2021-07-09 17:46:02,350 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2459 transitions. Word has length 21 [2021-07-09 17:46:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:02,350 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2459 transitions. [2021-07-09 17:46:02,350 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) [2021-07-09 17:46:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2459 transitions. [2021-07-09 17:46:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:46:02,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:02,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:02,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7899,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:02,551 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 634 times [2021-07-09 17:46:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:02,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841337495] [2021-07-09 17:46:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:02,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:02,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841337495] [2021-07-09 17:46:02,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841337495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:02,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120701343] [2021-07-09 17:46:02,674 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 [2021-07-09 17:46:02,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:46:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:02,957 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 12 treesize of output 8 [2021-07-09 17:46:02,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:02,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:02,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:02,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:02,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:02,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:02,969 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 11 treesize of output 7 [2021-07-09 17:46:02,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:02,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:02,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:02,990 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-07-09 17:46:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:03,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120701343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:03,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:03,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:46:03,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489115727] [2021-07-09 17:46:03,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:03,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:03,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:03,185 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) [2021-07-09 17:46:04,437 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-09 17:46:04,753 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-07-09 17:46:05,159 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-07-09 17:46:05,482 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-09 17:46:05,884 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-07-09 17:46:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:06,000 INFO L93 Difference]: Finished difference Result 1789 states and 5418 transitions. [2021-07-09 17:46:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:06,000 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 [2021-07-09 17:46:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:06,003 INFO L225 Difference]: With dead ends: 1789 [2021-07-09 17:46:06,003 INFO L226 Difference]: Without dead ends: 1705 [2021-07-09 17:46:06,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2447.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:46:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-09 17:46:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 776. [2021-07-09 17:46:06,016 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) [2021-07-09 17:46:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2548 transitions. [2021-07-09 17:46:06,017 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2548 transitions. Word has length 21 [2021-07-09 17:46:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:06,017 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2548 transitions. [2021-07-09 17:46:06,017 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) [2021-07-09 17:46:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2548 transitions. [2021-07-09 17:46:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:06,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:06,019 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:06,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7918 [2021-07-09 17:46:06,219 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1507938877, now seen corresponding path program 635 times [2021-07-09 17:46:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:06,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392286853] [2021-07-09 17:46:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:06,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392286853] [2021-07-09 17:46:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392286853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456433492] [2021-07-09 17:46:06,283 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 [2021-07-09 17:46:06,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:06,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:06,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:06,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:06,499 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 13 treesize of output 9 [2021-07-09 17:46:06,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:06,514 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:46:06,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:06,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:46:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:06,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456433492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:06,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:06,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 17:46:06,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734690633] [2021-07-09 17:46:06,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:06,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:06,561 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) [2021-07-09 17:46:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:06,929 INFO L93 Difference]: Finished difference Result 1186 states and 3742 transitions. [2021-07-09 17:46:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:46:06,929 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 [2021-07-09 17:46:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:06,931 INFO L225 Difference]: With dead ends: 1186 [2021-07-09 17:46:06,931 INFO L226 Difference]: Without dead ends: 1116 [2021-07-09 17:46:06,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:46:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-09 17:46:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2021-07-09 17:46:06,941 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) [2021-07-09 17:46:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2550 transitions. [2021-07-09 17:46:06,942 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2550 transitions. Word has length 22 [2021-07-09 17:46:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:06,942 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2550 transitions. [2021-07-09 17:46:06,942 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) [2021-07-09 17:46:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2550 transitions. [2021-07-09 17:46:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:06,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:06,943 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:07,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7930,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:07,144 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash -955884418, now seen corresponding path program 636 times [2021-07-09 17:46:07,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:07,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877420963] [2021-07-09 17:46:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:07,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877420963] [2021-07-09 17:46:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877420963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622755117] [2021-07-09 17:46:07,255 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 [2021-07-09 17:46:07,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:07,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:07,623 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_247], 1=[v_prenex_251, v_prenex_249]} [2021-07-09 17:46:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:07,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:07,677 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-07-09 17:46:07,679 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 6 treesize of output 4 [2021-07-09 17:46:07,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:07,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:07,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:07,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:07,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:07,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:07,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-07-09 17:46:07,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:07,737 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-09 17:46:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:07,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622755117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:07,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:07,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758155257] [2021-07-09 17:46:07,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:07,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:07,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:07,792 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) [2021-07-09 17:46:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:08,564 INFO L93 Difference]: Finished difference Result 1181 states and 3688 transitions. [2021-07-09 17:46:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:08,564 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 [2021-07-09 17:46:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:08,566 INFO L225 Difference]: With dead ends: 1181 [2021-07-09 17:46:08,566 INFO L226 Difference]: Without dead ends: 1181 [2021-07-09 17:46:08,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-09 17:46:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 795. [2021-07-09 17:46:08,576 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) [2021-07-09 17:46:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2605 transitions. [2021-07-09 17:46:08,578 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2605 transitions. Word has length 22 [2021-07-09 17:46:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:08,578 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2605 transitions. [2021-07-09 17:46:08,578 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) [2021-07-09 17:46:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2605 transitions. [2021-07-09 17:46:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:08,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:08,579 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:08,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7934,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:08,780 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash 202759112, now seen corresponding path program 637 times [2021-07-09 17:46:08,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:08,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512663507] [2021-07-09 17:46:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:08,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:08,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512663507] [2021-07-09 17:46:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512663507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:08,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154287283] [2021-07-09 17:46:08,885 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 [2021-07-09 17:46:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:09,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:09,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:09,251 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 [2021-07-09 17:46:09,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:09,263 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-09 17:46:09,263 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:46:09,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:09,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:46:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154287283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:09,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:09,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616961047] [2021-07-09 17:46:09,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:09,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:09,343 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) [2021-07-09 17:46:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:09,970 INFO L93 Difference]: Finished difference Result 1233 states and 3809 transitions. [2021-07-09 17:46:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:09,970 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 [2021-07-09 17:46:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:09,972 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 17:46:09,972 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:46:09,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:46:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 798. [2021-07-09 17:46:09,983 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) [2021-07-09 17:46:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2616 transitions. [2021-07-09 17:46:09,984 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2616 transitions. Word has length 22 [2021-07-09 17:46:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:09,984 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2616 transitions. [2021-07-09 17:46:09,984 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) [2021-07-09 17:46:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2616 transitions. [2021-07-09 17:46:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:09,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:09,985 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:10,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7949 [2021-07-09 17:46:10,186 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1291148610, now seen corresponding path program 638 times [2021-07-09 17:46:10,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:10,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629348744] [2021-07-09 17:46:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:10,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629348744] [2021-07-09 17:46:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629348744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620966679] [2021-07-09 17:46:10,285 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 [2021-07-09 17:46:10,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:10,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:10,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:10,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:10,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:10,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,669 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-09 17:46:10,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-07-09 17:46:10,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:10,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:46:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:10,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620966679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:10,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:10,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137706510] [2021-07-09 17:46:10,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:10,724 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) [2021-07-09 17:46:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:11,420 INFO L93 Difference]: Finished difference Result 1190 states and 3706 transitions. [2021-07-09 17:46:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:11,420 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 [2021-07-09 17:46:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:11,422 INFO L225 Difference]: With dead ends: 1190 [2021-07-09 17:46:11,422 INFO L226 Difference]: Without dead ends: 1184 [2021-07-09 17:46:11,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-07-09 17:46:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 790. [2021-07-09 17:46:11,432 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) [2021-07-09 17:46:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2592 transitions. [2021-07-09 17:46:11,434 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2592 transitions. Word has length 22 [2021-07-09 17:46:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:11,434 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2592 transitions. [2021-07-09 17:46:11,434 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) [2021-07-09 17:46:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2592 transitions. [2021-07-09 17:46:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:11,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:11,435 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:11,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7965,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:11,636 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1296850700, now seen corresponding path program 639 times [2021-07-09 17:46:11,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:11,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702042743] [2021-07-09 17:46:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:11,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702042743] [2021-07-09 17:46:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702042743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065010641] [2021-07-09 17:46:11,756 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 [2021-07-09 17:46:11,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:11,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:12,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065010641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:12,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:12,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:12,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260628969] [2021-07-09 17:46:12,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:12,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:12,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:12,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:12,261 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) [2021-07-09 17:46:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:12,988 INFO L93 Difference]: Finished difference Result 1167 states and 3629 transitions. [2021-07-09 17:46:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:12,989 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 [2021-07-09 17:46:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:12,991 INFO L225 Difference]: With dead ends: 1167 [2021-07-09 17:46:12,991 INFO L226 Difference]: Without dead ends: 1167 [2021-07-09 17:46:12,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-09 17:46:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 796. [2021-07-09 17:46:13,001 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) [2021-07-09 17:46:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2614 transitions. [2021-07-09 17:46:13,002 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2614 transitions. Word has length 22 [2021-07-09 17:46:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:13,002 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2614 transitions. [2021-07-09 17:46:13,002 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) [2021-07-09 17:46:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2614 transitions. [2021-07-09 17:46:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:13,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:13,003 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:13,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-07-09 17:46:13,204 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -197057022, now seen corresponding path program 640 times [2021-07-09 17:46:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:13,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105348852] [2021-07-09 17:46:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105348852] [2021-07-09 17:46:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105348852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721516723] [2021-07-09 17:46:13,323 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 [2021-07-09 17:46:13,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:13,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721516723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:13,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:13,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:13,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714273439] [2021-07-09 17:46:13,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:13,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:13,840 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) [2021-07-09 17:46:14,453 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-07-09 17:46:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:14,656 INFO L93 Difference]: Finished difference Result 1173 states and 3636 transitions. [2021-07-09 17:46:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:14,656 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 [2021-07-09 17:46:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:14,658 INFO L225 Difference]: With dead ends: 1173 [2021-07-09 17:46:14,658 INFO L226 Difference]: Without dead ends: 1167 [2021-07-09 17:46:14,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 893.2ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-09 17:46:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 793. [2021-07-09 17:46:14,669 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) [2021-07-09 17:46:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2603 transitions. [2021-07-09 17:46:14,670 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2603 transitions. Word has length 22 [2021-07-09 17:46:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:14,670 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2603 transitions. [2021-07-09 17:46:14,670 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) [2021-07-09 17:46:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2603 transitions. [2021-07-09 17:46:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:14,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:14,672 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:14,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7998,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:14,872 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 340798556, now seen corresponding path program 641 times [2021-07-09 17:46:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:14,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315754470] [2021-07-09 17:46:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:15,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315754470] [2021-07-09 17:46:15,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315754470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:15,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652612365] [2021-07-09 17:46:15,002 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 [2021-07-09 17:46:15,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:15,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652612365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:15,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:15,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:15,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86351077] [2021-07-09 17:46:15,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:15,469 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) [2021-07-09 17:46:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:16,285 INFO L93 Difference]: Finished difference Result 1131 states and 3541 transitions. [2021-07-09 17:46:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:16,285 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 [2021-07-09 17:46:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:16,287 INFO L225 Difference]: With dead ends: 1131 [2021-07-09 17:46:16,287 INFO L226 Difference]: Without dead ends: 1119 [2021-07-09 17:46:16,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-09 17:46:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-07-09 17:46:16,296 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) [2021-07-09 17:46:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2600 transitions. [2021-07-09 17:46:16,298 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2600 transitions. Word has length 22 [2021-07-09 17:46:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:16,298 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2600 transitions. [2021-07-09 17:46:16,298 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) [2021-07-09 17:46:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2600 transitions. [2021-07-09 17:46:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:16,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:16,299 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:16,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8019 [2021-07-09 17:46:16,499 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:16,500 INFO L82 PathProgramCache]: Analyzing trace with hash 853951560, now seen corresponding path program 642 times [2021-07-09 17:46:16,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:16,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690675527] [2021-07-09 17:46:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:16,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690675527] [2021-07-09 17:46:16,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690675527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635633166] [2021-07-09 17:46:16,615 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 [2021-07-09 17:46:16,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:16,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:16,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:17,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635633166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:17,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:17,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:17,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959366468] [2021-07-09 17:46:17,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:17,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:17,113 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) [2021-07-09 17:46:17,641 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:46:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:17,977 INFO L93 Difference]: Finished difference Result 1164 states and 3618 transitions. [2021-07-09 17:46:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:17,977 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 [2021-07-09 17:46:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:17,979 INFO L225 Difference]: With dead ends: 1164 [2021-07-09 17:46:17,979 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 17:46:17,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 17:46:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 802. [2021-07-09 17:46:17,990 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) [2021-07-09 17:46:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2633 transitions. [2021-07-09 17:46:17,991 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2633 transitions. Word has length 22 [2021-07-09 17:46:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:17,991 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2633 transitions. [2021-07-09 17:46:17,991 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) [2021-07-09 17:46:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2633 transitions. [2021-07-09 17:46:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:17,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:17,992 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:18,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8039 [2021-07-09 17:46:18,193 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -639956162, now seen corresponding path program 643 times [2021-07-09 17:46:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:18,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587699511] [2021-07-09 17:46:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:18,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:18,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587699511] [2021-07-09 17:46:18,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587699511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:18,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164476634] [2021-07-09 17:46:18,306 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 [2021-07-09 17:46:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:18,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164476634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:18,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:18,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:18,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706712850] [2021-07-09 17:46:18,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:18,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:18,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:18,851 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) [2021-07-09 17:46:19,544 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 17:46:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:19,797 INFO L93 Difference]: Finished difference Result 1170 states and 3625 transitions. [2021-07-09 17:46:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:19,797 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 [2021-07-09 17:46:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:19,799 INFO L225 Difference]: With dead ends: 1170 [2021-07-09 17:46:19,799 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 17:46:19,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 961.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 17:46:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 799. [2021-07-09 17:46:19,809 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) [2021-07-09 17:46:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2622 transitions. [2021-07-09 17:46:19,811 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2622 transitions. Word has length 22 [2021-07-09 17:46:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:19,811 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2622 transitions. [2021-07-09 17:46:19,811 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) [2021-07-09 17:46:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2622 transitions. [2021-07-09 17:46:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:19,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:19,812 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8056,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:20,012 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash -102100584, now seen corresponding path program 644 times [2021-07-09 17:46:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451065187] [2021-07-09 17:46:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:20,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:20,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451065187] [2021-07-09 17:46:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451065187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:20,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689853454] [2021-07-09 17:46:20,151 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 [2021-07-09 17:46:20,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:20,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:20,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689853454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:20,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:20,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:20,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384155439] [2021-07-09 17:46:20,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:20,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:20,642 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) [2021-07-09 17:46:21,209 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:46:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:21,577 INFO L93 Difference]: Finished difference Result 1134 states and 3543 transitions. [2021-07-09 17:46:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:21,578 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 [2021-07-09 17:46:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:21,579 INFO L225 Difference]: With dead ends: 1134 [2021-07-09 17:46:21,579 INFO L226 Difference]: Without dead ends: 1122 [2021-07-09 17:46:21,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-07-09 17:46:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 796. [2021-07-09 17:46:21,589 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) [2021-07-09 17:46:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2611 transitions. [2021-07-09 17:46:21,590 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2611 transitions. Word has length 22 [2021-07-09 17:46:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:21,590 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2611 transitions. [2021-07-09 17:46:21,590 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) [2021-07-09 17:46:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2611 transitions. [2021-07-09 17:46:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:21,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:21,592 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:21,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8075 [2021-07-09 17:46:21,792 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -608446850, now seen corresponding path program 645 times [2021-07-09 17:46:21,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:21,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705651313] [2021-07-09 17:46:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:21,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:21,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705651313] [2021-07-09 17:46:21,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705651313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:21,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991658405] [2021-07-09 17:46:21,904 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 [2021-07-09 17:46:22,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:22,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991658405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:22,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:22,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:22,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532544875] [2021-07-09 17:46:22,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:22,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:22,369 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) [2021-07-09 17:46:22,963 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:46:23,154 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-09 17:46:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:23,331 INFO L93 Difference]: Finished difference Result 1125 states and 3519 transitions. [2021-07-09 17:46:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:23,331 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 [2021-07-09 17:46:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:23,333 INFO L225 Difference]: With dead ends: 1125 [2021-07-09 17:46:23,333 INFO L226 Difference]: Without dead ends: 1107 [2021-07-09 17:46:23,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 932.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-07-09 17:46:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 796. [2021-07-09 17:46:23,350 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) [2021-07-09 17:46:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2608 transitions. [2021-07-09 17:46:23,351 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2608 transitions. Word has length 22 [2021-07-09 17:46:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2608 transitions. [2021-07-09 17:46:23,351 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) [2021-07-09 17:46:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2608 transitions. [2021-07-09 17:46:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:23,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:23,352 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8090,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:23,553 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -835991344, now seen corresponding path program 646 times [2021-07-09 17:46:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208208158] [2021-07-09 17:46:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:23,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208208158] [2021-07-09 17:46:23,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208208158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738658330] [2021-07-09 17:46:23,682 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 [2021-07-09 17:46:23,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:23,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738658330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:24,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:24,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269141503] [2021-07-09 17:46:24,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:24,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:24,204 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) [2021-07-09 17:46:24,648 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-09 17:46:24,840 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-09 17:46:25,040 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-09 17:46:25,216 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-07-09 17:46:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:25,395 INFO L93 Difference]: Finished difference Result 1221 states and 3760 transitions. [2021-07-09 17:46:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:25,395 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 [2021-07-09 17:46:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:25,397 INFO L225 Difference]: With dead ends: 1221 [2021-07-09 17:46:25,397 INFO L226 Difference]: Without dead ends: 1221 [2021-07-09 17:46:25,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1202.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-07-09 17:46:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 808. [2021-07-09 17:46:25,407 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) [2021-07-09 17:46:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2652 transitions. [2021-07-09 17:46:25,409 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2652 transitions. Word has length 22 [2021-07-09 17:46:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:25,409 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2652 transitions. [2021-07-09 17:46:25,409 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) [2021-07-09 17:46:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2652 transitions. [2021-07-09 17:46:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:25,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:25,410 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:25,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8105,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:25,611 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:25,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1965068230, now seen corresponding path program 647 times [2021-07-09 17:46:25,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:25,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472691253] [2021-07-09 17:46:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:25,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472691253] [2021-07-09 17:46:25,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472691253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352805558] [2021-07-09 17:46:25,723 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 [2021-07-09 17:46:25,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:25,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352805558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:26,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:26,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566777029] [2021-07-09 17:46:26,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:26,270 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) [2021-07-09 17:46:26,722 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-09 17:46:26,910 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-07-09 17:46:27,104 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-07-09 17:46:27,279 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-09 17:46:27,460 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-09 17:46:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:27,494 INFO L93 Difference]: Finished difference Result 1227 states and 3767 transitions. [2021-07-09 17:46:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:27,494 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 [2021-07-09 17:46:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:27,496 INFO L225 Difference]: With dead ends: 1227 [2021-07-09 17:46:27,496 INFO L226 Difference]: Without dead ends: 1221 [2021-07-09 17:46:27,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1253.5ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-07-09 17:46:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 805. [2021-07-09 17:46:27,506 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) [2021-07-09 17:46:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2641 transitions. [2021-07-09 17:46:27,508 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2641 transitions. Word has length 22 [2021-07-09 17:46:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:27,508 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2641 transitions. [2021-07-09 17:46:27,508 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) [2021-07-09 17:46:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2641 transitions. [2021-07-09 17:46:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:27,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:27,510 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:27,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8120 [2021-07-09 17:46:27,722 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:27,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1792043488, now seen corresponding path program 648 times [2021-07-09 17:46:27,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:27,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089548660] [2021-07-09 17:46:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089548660] [2021-07-09 17:46:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089548660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:27,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300910834] [2021-07-09 17:46:27,859 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 [2021-07-09 17:46:27,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:27,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:27,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:28,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300910834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:28,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:28,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:28,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106519197] [2021-07-09 17:46:28,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:28,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:28,366 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) [2021-07-09 17:46:28,777 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 17:46:28,959 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-07-09 17:46:29,156 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-09 17:46:29,342 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-07-09 17:46:29,506 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-07-09 17:46:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:29,526 INFO L93 Difference]: Finished difference Result 1191 states and 3685 transitions. [2021-07-09 17:46:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:29,527 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 [2021-07-09 17:46:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:29,529 INFO L225 Difference]: With dead ends: 1191 [2021-07-09 17:46:29,529 INFO L226 Difference]: Without dead ends: 1179 [2021-07-09 17:46:29,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1237.3ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-09 17:46:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 802. [2021-07-09 17:46:29,543 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) [2021-07-09 17:46:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2630 transitions. [2021-07-09 17:46:29,544 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2630 transitions. Word has length 22 [2021-07-09 17:46:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:29,544 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2630 transitions. [2021-07-09 17:46:29,544 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) [2021-07-09 17:46:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2630 transitions. [2021-07-09 17:46:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:29,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:29,545 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:29,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8138 [2021-07-09 17:46:29,746 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1996577542, now seen corresponding path program 649 times [2021-07-09 17:46:29,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:29,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091819677] [2021-07-09 17:46:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:29,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:29,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091819677] [2021-07-09 17:46:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091819677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:29,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448498027] [2021-07-09 17:46:29,853 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 [2021-07-09 17:46:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448498027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:30,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:30,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:30,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089450280] [2021-07-09 17:46:30,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:30,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:30,338 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) [2021-07-09 17:46:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:31,288 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2021-07-09 17:46:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:31,288 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 [2021-07-09 17:46:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:31,290 INFO L225 Difference]: With dead ends: 1188 [2021-07-09 17:46:31,290 INFO L226 Difference]: Without dead ends: 1170 [2021-07-09 17:46:31,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-09 17:46:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 799. [2021-07-09 17:46:31,300 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) [2021-07-09 17:46:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2619 transitions. [2021-07-09 17:46:31,301 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2619 transitions. Word has length 22 [2021-07-09 17:46:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:31,302 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2619 transitions. [2021-07-09 17:46:31,302 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) [2021-07-09 17:46:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2619 transitions. [2021-07-09 17:46:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:31,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:31,310 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-07-09 17:46:31,511 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1258153956, now seen corresponding path program 650 times [2021-07-09 17:46:31,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:31,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769129545] [2021-07-09 17:46:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769129545] [2021-07-09 17:46:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769129545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612390303] [2021-07-09 17:46:31,616 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 [2021-07-09 17:46:31,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:32,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612390303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:32,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:32,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754670485] [2021-07-09 17:46:32,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:32,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:32,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:32,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:32,061 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) [2021-07-09 17:46:32,499 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-09 17:46:32,673 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-07-09 17:46:32,856 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-07-09 17:46:33,024 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-09 17:46:33,185 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-09 17:46:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:33,209 INFO L93 Difference]: Finished difference Result 1179 states and 3650 transitions. [2021-07-09 17:46:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:33,209 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 [2021-07-09 17:46:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:33,211 INFO L225 Difference]: With dead ends: 1179 [2021-07-09 17:46:33,211 INFO L226 Difference]: Without dead ends: 1155 [2021-07-09 17:46:33,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-07-09 17:46:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 799. [2021-07-09 17:46:33,221 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) [2021-07-09 17:46:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2616 transitions. [2021-07-09 17:46:33,222 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2616 transitions. Word has length 22 [2021-07-09 17:46:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:33,222 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2616 transitions. [2021-07-09 17:46:33,222 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) [2021-07-09 17:46:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2616 transitions. [2021-07-09 17:46:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:33,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:33,223 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:33,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8165,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:33,424 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 644309949, now seen corresponding path program 651 times [2021-07-09 17:46:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:33,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345987685] [2021-07-09 17:46:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:33,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:33,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345987685] [2021-07-09 17:46:33,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345987685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:33,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133531721] [2021-07-09 17:46:33,497 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 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 [2021-07-09 17:46:33,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:33,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:33,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:33,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,736 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:46:33,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:33,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:46:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:33,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133531721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:33,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:33,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 17:46:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086819196] [2021-07-09 17:46:33,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:33,783 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) [2021-07-09 17:46:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:34,197 INFO L93 Difference]: Finished difference Result 1303 states and 4070 transitions. [2021-07-09 17:46:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:46:34,197 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 [2021-07-09 17:46:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:34,199 INFO L225 Difference]: With dead ends: 1303 [2021-07-09 17:46:34,199 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:46:34,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:46:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:46:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 806. [2021-07-09 17:46:34,209 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) [2021-07-09 17:46:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-07-09 17:46:34,211 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-07-09 17:46:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:34,211 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-07-09 17:46:34,211 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) [2021-07-09 17:46:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-07-09 17:46:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:34,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:34,212 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8184 [2021-07-09 17:46:34,412 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -8767304, now seen corresponding path program 652 times [2021-07-09 17:46:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885586779] [2021-07-09 17:46:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:34,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885586779] [2021-07-09 17:46:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885586779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081679628] [2021-07-09 17:46:34,527 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 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 [2021-07-09 17:46:34,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:34,922 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_309, nondet_0], 1=[v_prenex_310, v_prenex_313]} [2021-07-09 17:46:34,925 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 6 treesize of output 4 [2021-07-09 17:46:34,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:34,976 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-07-09 17:46:34,979 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 5 treesize of output 3 [2021-07-09 17:46:34,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:35,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:35,006 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 12 treesize of output 8 [2021-07-09 17:46:35,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:35,025 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-07-09 17:46:35,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:35,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-09 17:46:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:35,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081679628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:35,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:35,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439510430] [2021-07-09 17:46:35,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:35,081 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) [2021-07-09 17:46:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:35,814 INFO L93 Difference]: Finished difference Result 1256 states and 3898 transitions. [2021-07-09 17:46:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:35,814 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 [2021-07-09 17:46:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:35,817 INFO L225 Difference]: With dead ends: 1256 [2021-07-09 17:46:35,817 INFO L226 Difference]: Without dead ends: 1256 [2021-07-09 17:46:35,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-07-09 17:46:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 821. [2021-07-09 17:46:35,827 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) [2021-07-09 17:46:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2684 transitions. [2021-07-09 17:46:35,828 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2684 transitions. Word has length 22 [2021-07-09 17:46:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:35,829 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2684 transitions. [2021-07-09 17:46:35,829 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) [2021-07-09 17:46:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2684 transitions. [2021-07-09 17:46:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:35,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:35,830 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:36,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8189 [2021-07-09 17:46:36,030 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1149876226, now seen corresponding path program 653 times [2021-07-09 17:46:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:36,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777876360] [2021-07-09 17:46:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:36,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:36,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777876360] [2021-07-09 17:46:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777876360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666774715] [2021-07-09 17:46:36,154 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 [2021-07-09 17:46:36,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:36,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:36,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:36,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:36,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:36,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:36,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:36,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:36,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:36,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:36,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:36,572 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 5 treesize of output 3 [2021-07-09 17:46:36,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:36,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:36,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:36,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-07-09 17:46:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666774715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:36,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:36,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:36,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088047905] [2021-07-09 17:46:36,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:36,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:36,650 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) [2021-07-09 17:46:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:37,428 INFO L93 Difference]: Finished difference Result 1308 states and 4019 transitions. [2021-07-09 17:46:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:37,429 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 [2021-07-09 17:46:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:37,431 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 17:46:37,431 INFO L226 Difference]: Without dead ends: 1308 [2021-07-09 17:46:37,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 702.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-09 17:46:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 824. [2021-07-09 17:46:37,451 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) [2021-07-09 17:46:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2695 transitions. [2021-07-09 17:46:37,452 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2695 transitions. Word has length 22 [2021-07-09 17:46:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:37,452 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2695 transitions. [2021-07-09 17:46:37,452 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) [2021-07-09 17:46:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2695 transitions. [2021-07-09 17:46:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:37,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:37,453 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:37,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8204 [2021-07-09 17:46:37,654 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash -344031496, now seen corresponding path program 654 times [2021-07-09 17:46:37,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:37,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234619668] [2021-07-09 17:46:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:37,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234619668] [2021-07-09 17:46:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234619668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682341400] [2021-07-09 17:46:37,763 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 [2021-07-09 17:46:37,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:37,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:37,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:38,150 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_327, v_prenex_323], 1=[nondet_0, v_prenex_324]} [2021-07-09 17:46:38,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:38,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:38,205 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-07-09 17:46:38,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:46:38,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:38,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:38,231 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 5 treesize of output 3 [2021-07-09 17:46:38,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:38,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:38,234 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 8 [2021-07-09 17:46:38,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:38,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:38,253 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-07-09 17:46:38,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:38,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-07-09 17:46:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:38,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682341400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:38,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:38,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:38,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670253616] [2021-07-09 17:46:38,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:38,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:38,312 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) [2021-07-09 17:46:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:39,059 INFO L93 Difference]: Finished difference Result 1265 states and 3916 transitions. [2021-07-09 17:46:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:39,059 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 [2021-07-09 17:46:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:39,061 INFO L225 Difference]: With dead ends: 1265 [2021-07-09 17:46:39,061 INFO L226 Difference]: Without dead ends: 1259 [2021-07-09 17:46:39,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-07-09 17:46:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 816. [2021-07-09 17:46:39,072 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) [2021-07-09 17:46:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2671 transitions. [2021-07-09 17:46:39,073 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2671 transitions. Word has length 22 [2021-07-09 17:46:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:39,073 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2671 transitions. [2021-07-09 17:46:39,073 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) [2021-07-09 17:46:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2671 transitions. [2021-07-09 17:46:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:39,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:39,075 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:39,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8223 [2021-07-09 17:46:39,275 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2050999482, now seen corresponding path program 655 times [2021-07-09 17:46:39,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:39,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767583169] [2021-07-09 17:46:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:39,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767583169] [2021-07-09 17:46:39,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767583169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650504723] [2021-07-09 17:46:39,407 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 [2021-07-09 17:46:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:39,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650504723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:39,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:39,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:39,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501702434] [2021-07-09 17:46:39,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:39,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:39,942 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) [2021-07-09 17:46:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:40,798 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2021-07-09 17:46:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:40,798 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 [2021-07-09 17:46:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:40,801 INFO L225 Difference]: With dead ends: 1208 [2021-07-09 17:46:40,801 INFO L226 Difference]: Without dead ends: 1208 [2021-07-09 17:46:40,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 881.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-09 17:46:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 822. [2021-07-09 17:46:40,811 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) [2021-07-09 17:46:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2693 transitions. [2021-07-09 17:46:40,813 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2693 transitions. Word has length 22 [2021-07-09 17:46:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:40,813 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2693 transitions. [2021-07-09 17:46:40,813 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) [2021-07-09 17:46:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2693 transitions. [2021-07-09 17:46:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:40,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:40,814 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:41,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8239,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:41,014 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash 750060092, now seen corresponding path program 656 times [2021-07-09 17:46:41,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:41,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44613663] [2021-07-09 17:46:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:41,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44613663] [2021-07-09 17:46:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44613663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440374056] [2021-07-09 17:46:41,144 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 [2021-07-09 17:46:41,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:41,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:41,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440374056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:41,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:41,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:41,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100241052] [2021-07-09 17:46:41,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:41,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:41,659 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) [2021-07-09 17:46:42,290 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-07-09 17:46:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:42,498 INFO L93 Difference]: Finished difference Result 1214 states and 3758 transitions. [2021-07-09 17:46:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:42,498 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 [2021-07-09 17:46:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:42,500 INFO L225 Difference]: With dead ends: 1214 [2021-07-09 17:46:42,500 INFO L226 Difference]: Without dead ends: 1208 [2021-07-09 17:46:42,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 848.2ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-09 17:46:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 819. [2021-07-09 17:46:42,511 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) [2021-07-09 17:46:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2682 transitions. [2021-07-09 17:46:42,512 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2682 transitions. Word has length 22 [2021-07-09 17:46:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:42,512 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2682 transitions. [2021-07-09 17:46:42,513 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) [2021-07-09 17:46:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2682 transitions. [2021-07-09 17:46:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:42,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:42,514 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:42,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8251,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:42,714 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1287915670, now seen corresponding path program 657 times [2021-07-09 17:46:42,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:42,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387369977] [2021-07-09 17:46:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:42,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387369977] [2021-07-09 17:46:42,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387369977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:42,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048705246] [2021-07-09 17:46:42,854 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 [2021-07-09 17:46:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:43,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048705246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:43,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:43,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898332483] [2021-07-09 17:46:43,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:43,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:43,370 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) [2021-07-09 17:46:44,055 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-07-09 17:46:44,247 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-09 17:46:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:44,335 INFO L93 Difference]: Finished difference Result 1172 states and 3663 transitions. [2021-07-09 17:46:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:44,336 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 [2021-07-09 17:46:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:44,337 INFO L225 Difference]: With dead ends: 1172 [2021-07-09 17:46:44,337 INFO L226 Difference]: Without dead ends: 1160 [2021-07-09 17:46:44,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1017.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-07-09 17:46:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 811. [2021-07-09 17:46:44,347 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) [2021-07-09 17:46:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2658 transitions. [2021-07-09 17:46:44,349 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2658 transitions. Word has length 22 [2021-07-09 17:46:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2658 transitions. [2021-07-09 17:46:44,349 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) [2021-07-09 17:46:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2658 transitions. [2021-07-09 17:46:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:44,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:44,350 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:44,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8269 [2021-07-09 17:46:44,551 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1801068674, now seen corresponding path program 658 times [2021-07-09 17:46:44,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:44,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918074159] [2021-07-09 17:46:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:44,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918074159] [2021-07-09 17:46:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918074159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011553816] [2021-07-09 17:46:44,678 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 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 [2021-07-09 17:46:44,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:44,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:45,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011553816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:45,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:45,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714987982] [2021-07-09 17:46:45,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:45,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:45,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:45,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:45,214 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) [2021-07-09 17:46:45,755 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-07-09 17:46:45,902 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 17:46:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:46,119 INFO L93 Difference]: Finished difference Result 1197 states and 3719 transitions. [2021-07-09 17:46:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:46,120 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 [2021-07-09 17:46:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:46,122 INFO L225 Difference]: With dead ends: 1197 [2021-07-09 17:46:46,122 INFO L226 Difference]: Without dead ends: 1197 [2021-07-09 17:46:46,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-09 17:46:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 820. [2021-07-09 17:46:46,132 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) [2021-07-09 17:46:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2691 transitions. [2021-07-09 17:46:46,133 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2691 transitions. Word has length 22 [2021-07-09 17:46:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:46,133 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2691 transitions. [2021-07-09 17:46:46,133 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) [2021-07-09 17:46:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2691 transitions. [2021-07-09 17:46:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:46,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:46,134 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:46,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8290,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:46,335 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash 307160952, now seen corresponding path program 659 times [2021-07-09 17:46:46,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:46,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901117843] [2021-07-09 17:46:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:46,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901117843] [2021-07-09 17:46:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901117843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043863308] [2021-07-09 17:46:46,457 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 [2021-07-09 17:46:46,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:47,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043863308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:47,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:47,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:47,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399334506] [2021-07-09 17:46:47,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:47,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:47,001 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) [2021-07-09 17:46:47,558 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-07-09 17:46:47,702 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-09 17:46:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:47,910 INFO L93 Difference]: Finished difference Result 1203 states and 3726 transitions. [2021-07-09 17:46:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:47,910 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 [2021-07-09 17:46:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:47,912 INFO L225 Difference]: With dead ends: 1203 [2021-07-09 17:46:47,912 INFO L226 Difference]: Without dead ends: 1197 [2021-07-09 17:46:47,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 968.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-09 17:46:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 817. [2021-07-09 17:46:47,923 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) [2021-07-09 17:46:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2680 transitions. [2021-07-09 17:46:47,924 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2680 transitions. Word has length 22 [2021-07-09 17:46:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:47,924 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2680 transitions. [2021-07-09 17:46:47,924 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) [2021-07-09 17:46:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2680 transitions. [2021-07-09 17:46:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:47,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:47,925 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:48,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8302 [2021-07-09 17:46:48,126 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 845016530, now seen corresponding path program 660 times [2021-07-09 17:46:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:48,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792124714] [2021-07-09 17:46:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:48,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792124714] [2021-07-09 17:46:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792124714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349439731] [2021-07-09 17:46:48,264 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 [2021-07-09 17:46:48,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:48,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349439731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:48,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:48,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386028365] [2021-07-09 17:46:48,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:48,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:48,855 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) [2021-07-09 17:46:49,497 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:46:49,643 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-09 17:46:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:49,738 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-07-09 17:46:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:49,738 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 [2021-07-09 17:46:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:49,740 INFO L225 Difference]: With dead ends: 1167 [2021-07-09 17:46:49,740 INFO L226 Difference]: Without dead ends: 1155 [2021-07-09 17:46:49,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-07-09 17:46:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 814. [2021-07-09 17:46:49,750 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) [2021-07-09 17:46:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2669 transitions. [2021-07-09 17:46:49,751 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2669 transitions. Word has length 22 [2021-07-09 17:46:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:49,751 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2669 transitions. [2021-07-09 17:46:49,751 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) [2021-07-09 17:46:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2669 transitions. [2021-07-09 17:46:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:49,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:49,753 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:49,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8316 [2021-07-09 17:46:49,953 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 338670264, now seen corresponding path program 661 times [2021-07-09 17:46:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:49,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998827710] [2021-07-09 17:46:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:50,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:50,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998827710] [2021-07-09 17:46:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998827710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:50,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123237431] [2021-07-09 17:46:50,066 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 [2021-07-09 17:46:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123237431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:50,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:50,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:50,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289514278] [2021-07-09 17:46:50,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:50,576 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) [2021-07-09 17:46:51,232 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2021-07-09 17:46:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:51,415 INFO L93 Difference]: Finished difference Result 1158 states and 3620 transitions. [2021-07-09 17:46:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:51,415 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 [2021-07-09 17:46:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:51,417 INFO L225 Difference]: With dead ends: 1158 [2021-07-09 17:46:51,417 INFO L226 Difference]: Without dead ends: 1140 [2021-07-09 17:46:51,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-09 17:46:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 806. [2021-07-09 17:46:51,427 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) [2021-07-09 17:46:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-07-09 17:46:51,428 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-07-09 17:46:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:51,428 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-07-09 17:46:51,428 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) [2021-07-09 17:46:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-07-09 17:46:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:51,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:51,429 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:51,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8329,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:51,630 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1633724579, now seen corresponding path program 662 times [2021-07-09 17:46:51,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:51,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554931379] [2021-07-09 17:46:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554931379] [2021-07-09 17:46:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554931379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442010814] [2021-07-09 17:46:51,710 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 [2021-07-09 17:46:51,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:51,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:51,929 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 [2021-07-09 17:46:51,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:51,932 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 [2021-07-09 17:46:51,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:51,946 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-09 17:46:51,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:51,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-09 17:46:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:51,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442010814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:51,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:51,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 17:46:51,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596933463] [2021-07-09 17:46:51,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:51,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:51,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:51,994 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) [2021-07-09 17:46:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:52,411 INFO L93 Difference]: Finished difference Result 1193 states and 3775 transitions. [2021-07-09 17:46:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:46:52,411 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 [2021-07-09 17:46:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:52,413 INFO L225 Difference]: With dead ends: 1193 [2021-07-09 17:46:52,413 INFO L226 Difference]: Without dead ends: 1123 [2021-07-09 17:46:52,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:46:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-09 17:46:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 813. [2021-07-09 17:46:52,423 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) [2021-07-09 17:46:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-09 17:46:52,425 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-09 17:46:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:52,425 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-09 17:46:52,425 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) [2021-07-09 17:46:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-09 17:46:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:52,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:52,426 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:52,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-07-09 17:46:52,626 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:52,626 INFO L82 PathProgramCache]: Analyzing trace with hash -407865598, now seen corresponding path program 663 times [2021-07-09 17:46:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888203358] [2021-07-09 17:46:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:52,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888203358] [2021-07-09 17:46:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888203358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805676110] [2021-07-09 17:46:52,768 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 [2021-07-09 17:46:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:46:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:53,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:53,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:53,208 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 17:46:53,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:53,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:53,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:53,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:53,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:53,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:46:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:53,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805676110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:53,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:53,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:53,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635875380] [2021-07-09 17:46:53,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:53,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:53,272 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) [2021-07-09 17:46:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:54,026 INFO L93 Difference]: Finished difference Result 1258 states and 3914 transitions. [2021-07-09 17:46:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:54,027 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 [2021-07-09 17:46:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:54,029 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 17:46:54,029 INFO L226 Difference]: Without dead ends: 1258 [2021-07-09 17:46:54,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-07-09 17:46:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 823. [2021-07-09 17:46:54,040 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) [2021-07-09 17:46:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2700 transitions. [2021-07-09 17:46:54,041 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2700 transitions. Word has length 22 [2021-07-09 17:46:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:54,042 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2700 transitions. [2021-07-09 17:46:54,042 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) [2021-07-09 17:46:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2700 transitions. [2021-07-09 17:46:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:54,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:54,043 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:54,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8347,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:54,243 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:54,243 INFO L82 PathProgramCache]: Analyzing trace with hash 750777932, now seen corresponding path program 664 times [2021-07-09 17:46:54,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:54,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148739406] [2021-07-09 17:46:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:54,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148739406] [2021-07-09 17:46:54,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148739406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:54,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384155342] [2021-07-09 17:46:54,389 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 [2021-07-09 17:46:54,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:54,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:54,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:54,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:54,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,868 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 17:46:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:54,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:46:54,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:54,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:54,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:46:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384155342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:54,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:54,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:54,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248537819] [2021-07-09 17:46:54,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:54,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:54,948 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) [2021-07-09 17:46:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,734 INFO L93 Difference]: Finished difference Result 1310 states and 4035 transitions. [2021-07-09 17:46:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:55,734 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 [2021-07-09 17:46:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,736 INFO L225 Difference]: With dead ends: 1310 [2021-07-09 17:46:55,736 INFO L226 Difference]: Without dead ends: 1310 [2021-07-09 17:46:55,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 797.5ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-07-09 17:46:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 826. [2021-07-09 17:46:55,755 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) [2021-07-09 17:46:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2711 transitions. [2021-07-09 17:46:55,756 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2711 transitions. Word has length 22 [2021-07-09 17:46:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,756 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2711 transitions. [2021-07-09 17:46:55,756 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) [2021-07-09 17:46:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2711 transitions. [2021-07-09 17:46:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:55,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,757 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:55,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-07-09 17:46:55,958 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash -743129790, now seen corresponding path program 665 times [2021-07-09 17:46:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153884485] [2021-07-09 17:46:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:56,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153884485] [2021-07-09 17:46:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153884485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154496514] [2021-07-09 17:46:56,088 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 [2021-07-09 17:46:56,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:56,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:56,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:56,518 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 [2021-07-09 17:46:56,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:56,530 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-09 17:46:56,530 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:46:56,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:56,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:46:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:56,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154496514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:56,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:56,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780980994] [2021-07-09 17:46:56,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:56,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:56,585 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) [2021-07-09 17:46:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:57,350 INFO L93 Difference]: Finished difference Result 1267 states and 3932 transitions. [2021-07-09 17:46:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:57,351 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 [2021-07-09 17:46:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:57,353 INFO L225 Difference]: With dead ends: 1267 [2021-07-09 17:46:57,353 INFO L226 Difference]: Without dead ends: 1261 [2021-07-09 17:46:57,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-09 17:46:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 818. [2021-07-09 17:46:57,364 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) [2021-07-09 17:46:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2687 transitions. [2021-07-09 17:46:57,365 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2687 transitions. Word has length 22 [2021-07-09 17:46:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:57,365 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2687 transitions. [2021-07-09 17:46:57,365 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) [2021-07-09 17:46:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2687 transitions. [2021-07-09 17:46:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:57,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:57,366 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:57,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8389 [2021-07-09 17:46:57,567 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1844869520, now seen corresponding path program 666 times [2021-07-09 17:46:57,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:57,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508940418] [2021-07-09 17:46:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:57,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:57,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508940418] [2021-07-09 17:46:57,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508940418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384990102] [2021-07-09 17:46:57,717 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 [2021-07-09 17:46:57,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:46:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:58,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384990102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:58,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041991183] [2021-07-09 17:46:58,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:58,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:58,235 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) [2021-07-09 17:46:58,853 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2021-07-09 17:46:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:59,078 INFO L93 Difference]: Finished difference Result 1210 states and 3767 transitions. [2021-07-09 17:46:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:59,078 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 [2021-07-09 17:46:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:59,080 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:46:59,080 INFO L226 Difference]: Without dead ends: 1210 [2021-07-09 17:46:59,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:46:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-09 17:46:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 824. [2021-07-09 17:46:59,091 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) [2021-07-09 17:46:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2709 transitions. [2021-07-09 17:46:59,092 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2709 transitions. Word has length 22 [2021-07-09 17:46:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:59,092 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2709 transitions. [2021-07-09 17:46:59,092 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) [2021-07-09 17:46:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2709 transitions. [2021-07-09 17:46:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:46:59,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:59,094 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:59,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8408,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:59,294 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash 350961798, now seen corresponding path program 667 times [2021-07-09 17:46:59,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:59,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173443071] [2021-07-09 17:46:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:59,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:59,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173443071] [2021-07-09 17:46:59,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173443071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212427509] [2021-07-09 17:46:59,467 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 [2021-07-09 17:46:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:46:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:59,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212427509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:59,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:46:59,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067564564] [2021-07-09 17:46:59,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:59,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:59,954 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) [2021-07-09 17:47:00,572 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-09 17:47:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:00,780 INFO L93 Difference]: Finished difference Result 1216 states and 3774 transitions. [2021-07-09 17:47:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:00,780 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 [2021-07-09 17:47:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:00,782 INFO L225 Difference]: With dead ends: 1216 [2021-07-09 17:47:00,782 INFO L226 Difference]: Without dead ends: 1210 [2021-07-09 17:47:00,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-09 17:47:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 821. [2021-07-09 17:47:00,793 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) [2021-07-09 17:47:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2698 transitions. [2021-07-09 17:47:00,794 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2698 transitions. Word has length 22 [2021-07-09 17:47:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:00,795 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2698 transitions. [2021-07-09 17:47:00,795 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) [2021-07-09 17:47:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2698 transitions. [2021-07-09 17:47:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:00,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:00,796 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:00,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8422 [2021-07-09 17:47:00,996 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:00,996 INFO L82 PathProgramCache]: Analyzing trace with hash 888817376, now seen corresponding path program 668 times [2021-07-09 17:47:00,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:00,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147210676] [2021-07-09 17:47:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:01,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147210676] [2021-07-09 17:47:01,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147210676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642259105] [2021-07-09 17:47:01,158 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 [2021-07-09 17:47:01,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642259105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:01,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:01,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668607087] [2021-07-09 17:47:01,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:01,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:01,690 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) [2021-07-09 17:47:02,362 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-07-09 17:47:02,510 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-07-09 17:47:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:02,599 INFO L93 Difference]: Finished difference Result 1174 states and 3679 transitions. [2021-07-09 17:47:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:02,600 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 [2021-07-09 17:47:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:02,601 INFO L225 Difference]: With dead ends: 1174 [2021-07-09 17:47:02,601 INFO L226 Difference]: Without dead ends: 1162 [2021-07-09 17:47:02,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:02,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-09 17:47:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 813. [2021-07-09 17:47:02,611 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) [2021-07-09 17:47:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-09 17:47:02,613 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-09 17:47:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:02,613 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-09 17:47:02,613 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) [2021-07-09 17:47:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-09 17:47:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:02,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:02,614 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:02,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8437,693 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:02,815 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash -875925571, now seen corresponding path program 669 times [2021-07-09 17:47:02,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:02,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058798710] [2021-07-09 17:47:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:02,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058798710] [2021-07-09 17:47:02,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058798710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999714813] [2021-07-09 17:47:02,903 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 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 [2021-07-09 17:47:03,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:03,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:03,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:03,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,095 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 13 treesize of output 9 [2021-07-09 17:47:03,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:03,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:03,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:03,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:03,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:03,110 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:03,137 INFO L628 ElimStorePlain]: treesize reduction 14, result has 66.7 percent of original size [2021-07-09 17:47:03,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:03,138 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-07-09 17:47:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999714813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:03,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:47:03,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568885347] [2021-07-09 17:47:03,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:03,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:03,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:03,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:03,205 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) [2021-07-09 17:47:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:03,745 INFO L93 Difference]: Finished difference Result 1284 states and 4007 transitions. [2021-07-09 17:47:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:03,746 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 [2021-07-09 17:47:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:03,748 INFO L225 Difference]: With dead ends: 1284 [2021-07-09 17:47:03,748 INFO L226 Difference]: Without dead ends: 1223 [2021-07-09 17:47:03,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-09 17:47:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 820. [2021-07-09 17:47:03,758 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) [2021-07-09 17:47:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2710 transitions. [2021-07-09 17:47:03,759 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2710 transitions. Word has length 22 [2021-07-09 17:47:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:03,759 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2710 transitions. [2021-07-09 17:47:03,759 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) [2021-07-09 17:47:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2710 transitions. [2021-07-09 17:47:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:03,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:03,761 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:03,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8456,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:03,961 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 133449592, now seen corresponding path program 670 times [2021-07-09 17:47:03,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:03,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164471546] [2021-07-09 17:47:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:04,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164471546] [2021-07-09 17:47:04,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164471546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330747576] [2021-07-09 17:47:04,093 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 [2021-07-09 17:47:04,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:04,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:04,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:04,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:04,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:04,526 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-07-09 17:47:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:04,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:04,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:04,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:04,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:04,569 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-07-09 17:47:04,570 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-07-09 17:47:04,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:04,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-09 17:47:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:04,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330747576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:04,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:04,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800760326] [2021-07-09 17:47:04,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:04,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:04,662 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) [2021-07-09 17:47:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:05,427 INFO L93 Difference]: Finished difference Result 1417 states and 4388 transitions. [2021-07-09 17:47:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:05,428 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 [2021-07-09 17:47:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:05,430 INFO L225 Difference]: With dead ends: 1417 [2021-07-09 17:47:05,430 INFO L226 Difference]: Without dead ends: 1417 [2021-07-09 17:47:05,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 753.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-07-09 17:47:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 832. [2021-07-09 17:47:05,442 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) [2021-07-09 17:47:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-07-09 17:47:05,443 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-07-09 17:47:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:05,443 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-07-09 17:47:05,443 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) [2021-07-09 17:47:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-07-09 17:47:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:05,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:05,445 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:05,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8463 [2021-07-09 17:47:05,645 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1292093122, now seen corresponding path program 671 times [2021-07-09 17:47:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:05,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589683444] [2021-07-09 17:47:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:05,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589683444] [2021-07-09 17:47:05,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589683444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302197226] [2021-07-09 17:47:05,772 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 [2021-07-09 17:47:05,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:05,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:06,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:06,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:06,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:06,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:06,212 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-07-09 17:47:06,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:06,216 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 12 treesize of output 8 [2021-07-09 17:47:06,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:06,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:06,238 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:06,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:06,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-09 17:47:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302197226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:06,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:06,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219376831] [2021-07-09 17:47:06,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:06,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:06,376 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) [2021-07-09 17:47:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:07,198 INFO L93 Difference]: Finished difference Result 1449 states and 4447 transitions. [2021-07-09 17:47:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:07,199 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 [2021-07-09 17:47:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:07,201 INFO L225 Difference]: With dead ends: 1449 [2021-07-09 17:47:07,201 INFO L226 Difference]: Without dead ends: 1449 [2021-07-09 17:47:07,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-07-09 17:47:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 838. [2021-07-09 17:47:07,214 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) [2021-07-09 17:47:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2776 transitions. [2021-07-09 17:47:07,215 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2776 transitions. Word has length 22 [2021-07-09 17:47:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:07,215 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2776 transitions. [2021-07-09 17:47:07,215 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) [2021-07-09 17:47:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2776 transitions. [2021-07-09 17:47:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:07,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:07,216 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:07,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8483,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:07,417 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash -201814600, now seen corresponding path program 672 times [2021-07-09 17:47:07,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:07,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879661593] [2021-07-09 17:47:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:07,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879661593] [2021-07-09 17:47:07,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879661593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338354839] [2021-07-09 17:47:07,539 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 [2021-07-09 17:47:07,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:07,929 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 6 treesize of output 4 [2021-07-09 17:47:07,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:07,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:07,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:08,010 INFO L628 ElimStorePlain]: treesize reduction 48, result has 61.9 percent of original size [2021-07-09 17:47:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:08,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:08,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:08,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:08,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:08,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:08,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:08,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:08,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:08,082 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-07-09 17:47:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338354839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:08,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:08,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721348272] [2021-07-09 17:47:08,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:08,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:08,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:08,172 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) [2021-07-09 17:47:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:08,955 INFO L93 Difference]: Finished difference Result 1406 states and 4338 transitions. [2021-07-09 17:47:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:08,956 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 [2021-07-09 17:47:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:08,958 INFO L225 Difference]: With dead ends: 1406 [2021-07-09 17:47:08,958 INFO L226 Difference]: Without dead ends: 1400 [2021-07-09 17:47:08,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-09 17:47:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 830. [2021-07-09 17:47:08,970 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) [2021-07-09 17:47:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2752 transitions. [2021-07-09 17:47:08,972 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2752 transitions. Word has length 22 [2021-07-09 17:47:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:08,972 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2752 transitions. [2021-07-09 17:47:08,972 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) [2021-07-09 17:47:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2752 transitions. [2021-07-09 17:47:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:08,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:08,973 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:09,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8508,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:09,173 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash 543962077, now seen corresponding path program 673 times [2021-07-09 17:47:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:09,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997829799] [2021-07-09 17:47:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:09,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997829799] [2021-07-09 17:47:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997829799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410586564] [2021-07-09 17:47:09,247 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 [2021-07-09 17:47:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:09,471 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 12 treesize of output 8 [2021-07-09 17:47:09,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:09,474 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 [2021-07-09 17:47:09,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:09,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:09,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:09,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:09,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:09,498 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:47:09,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:09,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-07-09 17:47:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:09,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410586564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:09,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-07-09 17:47:09,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809480810] [2021-07-09 17:47:09,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:09,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:09,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:09,562 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) [2021-07-09 17:47:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:10,063 INFO L93 Difference]: Finished difference Result 1192 states and 3728 transitions. [2021-07-09 17:47:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:10,063 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 [2021-07-09 17:47:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:10,065 INFO L225 Difference]: With dead ends: 1192 [2021-07-09 17:47:10,065 INFO L226 Difference]: Without dead ends: 1108 [2021-07-09 17:47:10,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:47:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-09 17:47:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 810. [2021-07-09 17:47:10,075 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) [2021-07-09 17:47:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2661 transitions. [2021-07-09 17:47:10,076 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2661 transitions. Word has length 22 [2021-07-09 17:47:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:10,077 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2661 transitions. [2021-07-09 17:47:10,077 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) [2021-07-09 17:47:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2661 transitions. [2021-07-09 17:47:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:10,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:10,078 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:10,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8530,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,278 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1952026690, now seen corresponding path program 674 times [2021-07-09 17:47:10,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:10,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887878775] [2021-07-09 17:47:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:10,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887878775] [2021-07-09 17:47:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887878775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410093569] [2021-07-09 17:47:10,421 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 [2021-07-09 17:47:10,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:10,798 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_426, v_prenex_421, v_prenex_422], 1=[v_prenex_428, nondet_0, v_prenex_423]} [2021-07-09 17:47:10,813 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 6 treesize of output 4 [2021-07-09 17:47:10,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:10,948 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-09 17:47:10,949 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-07-09 17:47:10,952 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 5 treesize of output 3 [2021-07-09 17:47:10,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:11,017 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 6 treesize of output 4 [2021-07-09 17:47:11,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:11,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:11,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:11,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:11,141 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:11,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:11,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:11,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:11,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:11,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:11,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:11,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:47:11,191 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-07-09 17:47:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:11,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410093569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:11,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:11,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:11,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766786993] [2021-07-09 17:47:11,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:11,288 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) [2021-07-09 17:47:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:12,128 INFO L93 Difference]: Finished difference Result 1340 states and 4171 transitions. [2021-07-09 17:47:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:12,128 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 [2021-07-09 17:47:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:12,131 INFO L225 Difference]: With dead ends: 1340 [2021-07-09 17:47:12,131 INFO L226 Difference]: Without dead ends: 1340 [2021-07-09 17:47:12,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-07-09 17:47:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 806. [2021-07-09 17:47:12,141 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) [2021-07-09 17:47:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-07-09 17:47:12,143 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 22 [2021-07-09 17:47:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:12,143 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-07-09 17:47:12,143 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) [2021-07-09 17:47:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-07-09 17:47:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:12,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:12,144 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8542 [2021-07-09 17:47:12,344 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -709889214, now seen corresponding path program 675 times [2021-07-09 17:47:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644031389] [2021-07-09 17:47:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:12,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644031389] [2021-07-09 17:47:12,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644031389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752892068] [2021-07-09 17:47:12,477 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 [2021-07-09 17:47:12,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:47:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:12,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:12,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:12,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:12,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:12,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:12,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:12,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:12,948 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 12 treesize of output 8 [2021-07-09 17:47:12,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:13,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:13,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:13,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:13,019 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 19 treesize of output 13 [2021-07-09 17:47:13,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:13,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:13,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:13,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:13,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:47:13,073 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:174, output treesize:61 [2021-07-09 17:47:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752892068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:13,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:13,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:47:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077049349] [2021-07-09 17:47:13,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:47:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:47:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:47:13,255 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) [2021-07-09 17:47:14,237 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-09 17:47:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:14,517 INFO L93 Difference]: Finished difference Result 1285 states and 4035 transitions. [2021-07-09 17:47:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:14,517 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 [2021-07-09 17:47:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:14,519 INFO L225 Difference]: With dead ends: 1285 [2021-07-09 17:47:14,519 INFO L226 Difference]: Without dead ends: 1264 [2021-07-09 17:47:14,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1260.8ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-09 17:47:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 800. [2021-07-09 17:47:14,533 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) [2021-07-09 17:47:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2619 transitions. [2021-07-09 17:47:14,535 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2619 transitions. Word has length 22 [2021-07-09 17:47:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:14,535 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2619 transitions. [2021-07-09 17:47:14,535 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) [2021-07-09 17:47:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2619 transitions. [2021-07-09 17:47:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:14,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:14,536 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:14,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8559,700 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:14,745 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1378076080, now seen corresponding path program 676 times [2021-07-09 17:47:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:14,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024229028] [2021-07-09 17:47:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:14,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024229028] [2021-07-09 17:47:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024229028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489898581] [2021-07-09 17:47:14,878 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 [2021-07-09 17:47:15,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:15,242 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 6 treesize of output 4 [2021-07-09 17:47:15,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:15,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:15,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:15,302 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-07-09 17:47:15,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_440 vanished before elimination [2021-07-09 17:47:15,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:15,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:15,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:15,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:15,323 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-09 17:47:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:15,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489898581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:15,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:15,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003315945] [2021-07-09 17:47:15,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:15,426 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) [2021-07-09 17:47:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:16,267 INFO L93 Difference]: Finished difference Result 1364 states and 4234 transitions. [2021-07-09 17:47:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:16,267 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 [2021-07-09 17:47:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:16,269 INFO L225 Difference]: With dead ends: 1364 [2021-07-09 17:47:16,269 INFO L226 Difference]: Without dead ends: 1364 [2021-07-09 17:47:16,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 781.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-07-09 17:47:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 808. [2021-07-09 17:47:16,280 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) [2021-07-09 17:47:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2655 transitions. [2021-07-09 17:47:16,282 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2655 transitions. Word has length 22 [2021-07-09 17:47:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:16,282 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2655 transitions. [2021-07-09 17:47:16,282 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) [2021-07-09 17:47:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2655 transitions. [2021-07-09 17:47:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:16,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:16,284 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:16,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8576 [2021-07-09 17:47:16,484 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1422983494, now seen corresponding path program 677 times [2021-07-09 17:47:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:16,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691120869] [2021-07-09 17:47:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:16,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:16,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691120869] [2021-07-09 17:47:16,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691120869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:16,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538931888] [2021-07-09 17:47:16,621 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 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 [2021-07-09 17:47:16,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:16,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:17,006 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_445], 1=[v_prenex_448, v_prenex_450, v_prenex_446]} [2021-07-09 17:47:17,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:17,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:17,100 INFO L628 ElimStorePlain]: treesize reduction 72, result has 56.9 percent of original size [2021-07-09 17:47:17,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:17,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:17,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:17,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:17,143 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:47:17,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:17,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:17,181 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 6 treesize of output 4 [2021-07-09 17:47:17,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:17,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:17,184 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 13 treesize of output 9 [2021-07-09 17:47:17,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:17,232 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-07-09 17:47:17,232 INFO L518 ElimStorePlain]: Eliminatee v_prenex_446 vanished before elimination [2021-07-09 17:47:17,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:47:17,233 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-07-09 17:47:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538931888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:17,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:17,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584509484] [2021-07-09 17:47:17,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:17,336 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) [2021-07-09 17:47:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,091 INFO L93 Difference]: Finished difference Result 1350 states and 4183 transitions. [2021-07-09 17:47:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:18,091 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 [2021-07-09 17:47:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,093 INFO L225 Difference]: With dead ends: 1350 [2021-07-09 17:47:18,093 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:47:18,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:47:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 805. [2021-07-09 17:47:18,104 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) [2021-07-09 17:47:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2644 transitions. [2021-07-09 17:47:18,106 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2644 transitions. Word has length 22 [2021-07-09 17:47:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,106 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2644 transitions. [2021-07-09 17:47:18,106 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) [2021-07-09 17:47:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2644 transitions. [2021-07-09 17:47:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:18,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,107 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8597,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:18,308 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash -626675642, now seen corresponding path program 678 times [2021-07-09 17:47:18,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249943240] [2021-07-09 17:47:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:18,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249943240] [2021-07-09 17:47:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249943240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126295112] [2021-07-09 17:47:18,475 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 [2021-07-09 17:47:18,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:18,899 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_460, v_prenex_455], 1=[nondet_0, v_prenex_456, v_prenex_457]} [2021-07-09 17:47:18,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:47:18,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:18,995 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-07-09 17:47:18,995 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-07-09 17:47:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:18,999 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 12 treesize of output 8 [2021-07-09 17:47:18,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:19,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:19,037 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 6 treesize of output 4 [2021-07-09 17:47:19,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:19,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:19,041 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 [2021-07-09 17:47:19,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:19,088 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-07-09 17:47:19,088 INFO L518 ElimStorePlain]: Eliminatee v_prenex_457 vanished before elimination [2021-07-09 17:47:19,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:47:19,089 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-07-09 17:47:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126295112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:19,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6200641] [2021-07-09 17:47:19,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:19,199 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) [2021-07-09 17:47:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:20,263 INFO L93 Difference]: Finished difference Result 1393 states and 4296 transitions. [2021-07-09 17:47:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:20,263 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 [2021-07-09 17:47:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:20,265 INFO L225 Difference]: With dead ends: 1393 [2021-07-09 17:47:20,265 INFO L226 Difference]: Without dead ends: 1372 [2021-07-09 17:47:20,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1046.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-09 17:47:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 801. [2021-07-09 17:47:20,277 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) [2021-07-09 17:47:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2624 transitions. [2021-07-09 17:47:20,278 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2624 transitions. Word has length 22 [2021-07-09 17:47:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:20,278 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2624 transitions. [2021-07-09 17:47:20,278 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) [2021-07-09 17:47:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2624 transitions. [2021-07-09 17:47:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:20,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:20,279 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:20,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8616 [2021-07-09 17:47:20,480 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash -605939114, now seen corresponding path program 679 times [2021-07-09 17:47:20,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:20,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632896704] [2021-07-09 17:47:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:20,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:20,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632896704] [2021-07-09 17:47:20,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632896704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617737019] [2021-07-09 17:47:20,617 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 [2021-07-09 17:47:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:20,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:20,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:20,994 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 13 treesize of output 9 [2021-07-09 17:47:20,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:20,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:47:20,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:21,038 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-07-09 17:47:21,038 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-07-09 17:47:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:21,041 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 12 treesize of output 8 [2021-07-09 17:47:21,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:21,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:47:21,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:21,059 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-07-09 17:47:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617737019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:21,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:21,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:21,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470345726] [2021-07-09 17:47:21,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:21,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:21,159 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) [2021-07-09 17:47:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:22,173 INFO L93 Difference]: Finished difference Result 1299 states and 4050 transitions. [2021-07-09 17:47:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:22,174 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 [2021-07-09 17:47:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:22,176 INFO L225 Difference]: With dead ends: 1299 [2021-07-09 17:47:22,176 INFO L226 Difference]: Without dead ends: 1272 [2021-07-09 17:47:22,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-09 17:47:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 803. [2021-07-09 17:47:22,186 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) [2021-07-09 17:47:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2629 transitions. [2021-07-09 17:47:22,188 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2629 transitions. Word has length 22 [2021-07-09 17:47:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:22,188 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2629 transitions. [2021-07-09 17:47:22,188 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) [2021-07-09 17:47:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2629 transitions. [2021-07-09 17:47:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:22,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:22,189 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:22,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8635,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:22,389 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash 674002882, now seen corresponding path program 680 times [2021-07-09 17:47:22,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:22,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356310283] [2021-07-09 17:47:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356310283] [2021-07-09 17:47:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356310283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214064302] [2021-07-09 17:47:22,591 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 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 [2021-07-09 17:47:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:23,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214064302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:23,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926032413] [2021-07-09 17:47:23,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:23,219 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) [2021-07-09 17:47:23,812 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-07-09 17:47:24,006 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-07-09 17:47:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:24,239 INFO L93 Difference]: Finished difference Result 1217 states and 3816 transitions. [2021-07-09 17:47:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:24,239 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 [2021-07-09 17:47:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:24,241 INFO L225 Difference]: With dead ends: 1217 [2021-07-09 17:47:24,241 INFO L226 Difference]: Without dead ends: 1217 [2021-07-09 17:47:24,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1126.9ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-09 17:47:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 810. [2021-07-09 17:47:24,252 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) [2021-07-09 17:47:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2656 transitions. [2021-07-09 17:47:24,253 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2656 transitions. Word has length 22 [2021-07-09 17:47:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:24,253 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2656 transitions. [2021-07-09 17:47:24,253 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) [2021-07-09 17:47:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2656 transitions. [2021-07-09 17:47:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:24,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,255 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:24,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8660 [2021-07-09 17:47:24,455 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash -819904840, now seen corresponding path program 681 times [2021-07-09 17:47:24,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:24,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167944382] [2021-07-09 17:47:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167944382] [2021-07-09 17:47:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167944382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072712651] [2021-07-09 17:47:24,631 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 [2021-07-09 17:47:24,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:47:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:24,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072712651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:25,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427025870] [2021-07-09 17:47:25,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:25,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:25,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:25,200 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) [2021-07-09 17:47:25,794 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-07-09 17:47:26,057 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-07-09 17:47:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:26,286 INFO L93 Difference]: Finished difference Result 1223 states and 3823 transitions. [2021-07-09 17:47:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:26,287 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 [2021-07-09 17:47:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:26,288 INFO L225 Difference]: With dead ends: 1223 [2021-07-09 17:47:26,288 INFO L226 Difference]: Without dead ends: 1217 [2021-07-09 17:47:26,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1128.0ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-09 17:47:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 807. [2021-07-09 17:47:26,299 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) [2021-07-09 17:47:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2645 transitions. [2021-07-09 17:47:26,300 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2645 transitions. Word has length 22 [2021-07-09 17:47:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:26,300 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2645 transitions. [2021-07-09 17:47:26,300 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) [2021-07-09 17:47:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2645 transitions. [2021-07-09 17:47:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:26,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:26,302 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:26,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8673 [2021-07-09 17:47:26,502 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:26,502 INFO L82 PathProgramCache]: Analyzing trace with hash -282049262, now seen corresponding path program 682 times [2021-07-09 17:47:26,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:26,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98881480] [2021-07-09 17:47:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:26,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98881480] [2021-07-09 17:47:26,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98881480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020745887] [2021-07-09 17:47:26,681 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 [2021-07-09 17:47:26,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:26,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020745887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:27,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122560668] [2021-07-09 17:47:27,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:27,357 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) [2021-07-09 17:47:27,971 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-07-09 17:47:28,225 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-07-09 17:47:28,404 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2021-07-09 17:47:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:28,495 INFO L93 Difference]: Finished difference Result 1187 states and 3741 transitions. [2021-07-09 17:47:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:28,495 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 [2021-07-09 17:47:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:28,497 INFO L225 Difference]: With dead ends: 1187 [2021-07-09 17:47:28,497 INFO L226 Difference]: Without dead ends: 1175 [2021-07-09 17:47:28,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-09 17:47:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 804. [2021-07-09 17:47:28,507 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) [2021-07-09 17:47:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-07-09 17:47:28,508 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-07-09 17:47:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:28,509 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-07-09 17:47:28,509 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) [2021-07-09 17:47:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-07-09 17:47:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:28,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:28,510 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:28,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8695 [2021-07-09 17:47:28,710 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1802387316, now seen corresponding path program 683 times [2021-07-09 17:47:28,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:28,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755747871] [2021-07-09 17:47:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:28,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755747871] [2021-07-09 17:47:28,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755747871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975599786] [2021-07-09 17:47:28,869 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 [2021-07-09 17:47:29,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:29,382 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 17:47:29,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:29,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:29,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:29,467 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:47:29,467 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:29,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:29,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975599786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573224457] [2021-07-09 17:47:29,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:29,547 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) [2021-07-09 17:47:30,118 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-07-09 17:47:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:30,493 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-07-09 17:47:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:30,493 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 [2021-07-09 17:47:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:30,495 INFO L225 Difference]: With dead ends: 1301 [2021-07-09 17:47:30,495 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:47:30,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:47:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 812. [2021-07-09 17:47:30,506 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) [2021-07-09 17:47:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2670 transitions. [2021-07-09 17:47:30,508 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2670 transitions. Word has length 22 [2021-07-09 17:47:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:30,508 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2670 transitions. [2021-07-09 17:47:30,508 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) [2021-07-09 17:47:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2670 transitions. [2021-07-09 17:47:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:30,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:30,509 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:30,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:30,709 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:30,710 INFO L82 PathProgramCache]: Analyzing trace with hash 998672258, now seen corresponding path program 684 times [2021-07-09 17:47:30,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:30,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207513335] [2021-07-09 17:47:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:30,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207513335] [2021-07-09 17:47:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207513335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146585425] [2021-07-09 17:47:30,893 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 [2021-07-09 17:47:31,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:31,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:31,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:31,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:31,498 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:47:31,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-07-09 17:47:31,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:31,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:31,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146585425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:31,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:31,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030551110] [2021-07-09 17:47:31,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:31,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:31,576 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) [2021-07-09 17:47:32,136 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-07-09 17:47:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:32,510 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-07-09 17:47:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:32,510 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 [2021-07-09 17:47:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:32,513 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:47:32,513 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:47:32,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1042.4ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:47:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 809. [2021-07-09 17:47:32,524 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) [2021-07-09 17:47:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2659 transitions. [2021-07-09 17:47:32,525 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2659 transitions. Word has length 22 [2021-07-09 17:47:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:32,525 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2659 transitions. [2021-07-09 17:47:32,525 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) [2021-07-09 17:47:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2659 transitions. [2021-07-09 17:47:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:32,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:32,526 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:32,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8729,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:32,727 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1050986878, now seen corresponding path program 685 times [2021-07-09 17:47:32,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:32,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623203520] [2021-07-09 17:47:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623203520] [2021-07-09 17:47:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623203520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566176502] [2021-07-09 17:47:32,889 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 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 [2021-07-09 17:47:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:33,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:33,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:33,451 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:47:33,451 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:33,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:33,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566176502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:33,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:33,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087587954] [2021-07-09 17:47:33,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:33,547 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) [2021-07-09 17:47:34,122 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-07-09 17:47:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:34,700 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-07-09 17:47:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:34,700 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 [2021-07-09 17:47:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:34,702 INFO L225 Difference]: With dead ends: 1296 [2021-07-09 17:47:34,702 INFO L226 Difference]: Without dead ends: 1275 [2021-07-09 17:47:34,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1144.7ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-09 17:47:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 805. [2021-07-09 17:47:34,713 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) [2021-07-09 17:47:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2639 transitions. [2021-07-09 17:47:34,714 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2639 transitions. Word has length 22 [2021-07-09 17:47:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:34,714 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2639 transitions. [2021-07-09 17:47:34,714 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) [2021-07-09 17:47:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2639 transitions. [2021-07-09 17:47:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:34,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:34,715 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:34,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8747,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:34,916 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1030250350, now seen corresponding path program 686 times [2021-07-09 17:47:34,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:34,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994287175] [2021-07-09 17:47:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994287175] [2021-07-09 17:47:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994287175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007514866] [2021-07-09 17:47:35,082 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 [2021-07-09 17:47:35,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:35,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:35,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:35,579 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:47:35,580 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:35,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:35,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007514866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:35,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575532733] [2021-07-09 17:47:35,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:35,656 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) [2021-07-09 17:47:36,225 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-07-09 17:47:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:36,649 INFO L93 Difference]: Finished difference Result 1252 states and 3909 transitions. [2021-07-09 17:47:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:36,649 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 [2021-07-09 17:47:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:36,651 INFO L225 Difference]: With dead ends: 1252 [2021-07-09 17:47:36,651 INFO L226 Difference]: Without dead ends: 1246 [2021-07-09 17:47:36,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 995.1ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:47:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-07-09 17:47:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 804. [2021-07-09 17:47:36,669 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) [2021-07-09 17:47:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-07-09 17:47:36,670 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-07-09 17:47:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:36,670 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-07-09 17:47:36,670 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) [2021-07-09 17:47:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-07-09 17:47:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:36,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:36,671 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:36,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-07-09 17:47:36,872 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1245859330, now seen corresponding path program 687 times [2021-07-09 17:47:36,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:36,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937371618] [2021-07-09 17:47:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937371618] [2021-07-09 17:47:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937371618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186173250] [2021-07-09 17:47:37,059 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 [2021-07-09 17:47:37,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:47:37,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:37,561 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 17:47:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186173250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:37,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571980590] [2021-07-09 17:47:37,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:37,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:37,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:37,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:37,728 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) [2021-07-09 17:47:38,359 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-07-09 17:47:38,596 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2021-07-09 17:47:38,772 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-07-09 17:47:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:38,863 INFO L93 Difference]: Finished difference Result 1178 states and 3717 transitions. [2021-07-09 17:47:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:38,864 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 [2021-07-09 17:47:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:38,866 INFO L225 Difference]: With dead ends: 1178 [2021-07-09 17:47:38,866 INFO L226 Difference]: Without dead ends: 1166 [2021-07-09 17:47:38,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1274.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-09 17:47:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 806. [2021-07-09 17:47:38,876 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) [2021-07-09 17:47:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-07-09 17:47:38,877 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-07-09 17:47:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:38,877 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-07-09 17:47:38,877 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) [2021-07-09 17:47:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-07-09 17:47:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:38,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:38,879 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:39,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8785 [2021-07-09 17:47:39,079 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1997259768, now seen corresponding path program 688 times [2021-07-09 17:47:39,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:39,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273299700] [2021-07-09 17:47:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273299700] [2021-07-09 17:47:39,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273299700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997906821] [2021-07-09 17:47:39,257 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 [2021-07-09 17:47:39,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:39,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:39,772 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-09 17:47:39,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:39,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:39,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:39,907 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-09 17:47:39,907 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:39,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:47:39,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-09 17:47:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997906821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:39,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:39,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647538620] [2021-07-09 17:47:39,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:39,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:39,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:39,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:39,955 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) [2021-07-09 17:47:40,574 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-07-09 17:47:40,797 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-09 17:47:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:41,156 INFO L93 Difference]: Finished difference Result 1201 states and 3767 transitions. [2021-07-09 17:47:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:41,157 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 [2021-07-09 17:47:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:41,159 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 17:47:41,159 INFO L226 Difference]: Without dead ends: 1174 [2021-07-09 17:47:41,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1294.0ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-07-09 17:47:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 806. [2021-07-09 17:47:41,179 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) [2021-07-09 17:47:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-07-09 17:47:41,181 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-07-09 17:47:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:41,181 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-07-09 17:47:41,181 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) [2021-07-09 17:47:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-07-09 17:47:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:41,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:41,182 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:41,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8803,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:41,382 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -136058736, now seen corresponding path program 689 times [2021-07-09 17:47:41,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:41,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975268128] [2021-07-09 17:47:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:41,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975268128] [2021-07-09 17:47:41,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975268128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018718827] [2021-07-09 17:47:41,517 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 [2021-07-09 17:47:41,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018718827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22526725] [2021-07-09 17:47:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:42,141 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) [2021-07-09 17:47:42,659 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-07-09 17:47:42,851 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2021-07-09 17:47:43,017 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-09 17:47:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:43,247 INFO L93 Difference]: Finished difference Result 1214 states and 3807 transitions. [2021-07-09 17:47:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:43,248 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 [2021-07-09 17:47:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:43,250 INFO L225 Difference]: With dead ends: 1214 [2021-07-09 17:47:43,250 INFO L226 Difference]: Without dead ends: 1214 [2021-07-09 17:47:43,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-07-09 17:47:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 816. [2021-07-09 17:47:43,261 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) [2021-07-09 17:47:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2677 transitions. [2021-07-09 17:47:43,262 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2677 transitions. Word has length 22 [2021-07-09 17:47:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:43,262 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2677 transitions. [2021-07-09 17:47:43,262 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) [2021-07-09 17:47:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2677 transitions. [2021-07-09 17:47:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:43,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:43,263 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8835,714 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:43,464 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1629966458, now seen corresponding path program 690 times [2021-07-09 17:47:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200434728] [2021-07-09 17:47:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:43,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200434728] [2021-07-09 17:47:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200434728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083524183] [2021-07-09 17:47:43,594 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 [2021-07-09 17:47:43,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:43,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083524183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877654521] [2021-07-09 17:47:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:44,224 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) [2021-07-09 17:47:44,695 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-07-09 17:47:44,885 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-07-09 17:47:45,060 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-09 17:47:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:45,271 INFO L93 Difference]: Finished difference Result 1220 states and 3814 transitions. [2021-07-09 17:47:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:45,271 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 [2021-07-09 17:47:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:45,273 INFO L225 Difference]: With dead ends: 1220 [2021-07-09 17:47:45,273 INFO L226 Difference]: Without dead ends: 1214 [2021-07-09 17:47:45,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1140.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-07-09 17:47:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 813. [2021-07-09 17:47:45,283 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) [2021-07-09 17:47:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2666 transitions. [2021-07-09 17:47:45,284 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2666 transitions. Word has length 22 [2021-07-09 17:47:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:45,284 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2666 transitions. [2021-07-09 17:47:45,284 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) [2021-07-09 17:47:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2666 transitions. [2021-07-09 17:47:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:45,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:45,286 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:45,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8850 [2021-07-09 17:47:45,486 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:45,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1092110880, now seen corresponding path program 691 times [2021-07-09 17:47:45,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:45,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854829028] [2021-07-09 17:47:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:45,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854829028] [2021-07-09 17:47:45,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854829028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767354664] [2021-07-09 17:47:45,628 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 [2021-07-09 17:47:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767354664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:46,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:46,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:46,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067487109] [2021-07-09 17:47:46,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:46,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:46,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:46,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:46,252 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) [2021-07-09 17:47:46,761 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-09 17:47:46,960 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2021-07-09 17:47:47,129 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 17:47:47,288 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-09 17:47:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:47,376 INFO L93 Difference]: Finished difference Result 1184 states and 3732 transitions. [2021-07-09 17:47:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:47,377 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 [2021-07-09 17:47:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:47,379 INFO L225 Difference]: With dead ends: 1184 [2021-07-09 17:47:47,379 INFO L226 Difference]: Without dead ends: 1172 [2021-07-09 17:47:47,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1181.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-07-09 17:47:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 810. [2021-07-09 17:47:47,388 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) [2021-07-09 17:47:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2655 transitions. [2021-07-09 17:47:47,390 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2655 transitions. Word has length 22 [2021-07-09 17:47:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:47,390 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2655 transitions. [2021-07-09 17:47:47,390 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) [2021-07-09 17:47:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2655 transitions. [2021-07-09 17:47:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:47,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:47,391 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:47,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8867,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:47,591 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:47,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1598457146, now seen corresponding path program 692 times [2021-07-09 17:47:47,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:47,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425212990] [2021-07-09 17:47:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:47,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425212990] [2021-07-09 17:47:47,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425212990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456712995] [2021-07-09 17:47:47,713 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 [2021-07-09 17:47:47,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456712995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:48,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:48,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:48,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113613257] [2021-07-09 17:47:48,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:48,315 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) [2021-07-09 17:47:48,831 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-09 17:47:49,026 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-07-09 17:47:49,203 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 59 [2021-07-09 17:47:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:49,394 INFO L93 Difference]: Finished difference Result 1181 states and 3721 transitions. [2021-07-09 17:47:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:49,395 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 [2021-07-09 17:47:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:49,396 INFO L225 Difference]: With dead ends: 1181 [2021-07-09 17:47:49,397 INFO L226 Difference]: Without dead ends: 1163 [2021-07-09 17:47:49,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-09 17:47:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 807. [2021-07-09 17:47:49,406 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) [2021-07-09 17:47:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2644 transitions. [2021-07-09 17:47:49,408 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2644 transitions. Word has length 22 [2021-07-09 17:47:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:49,408 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2644 transitions. [2021-07-09 17:47:49,408 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) [2021-07-09 17:47:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2644 transitions. [2021-07-09 17:47:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:49,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:49,409 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:49,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8890,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:49,609 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 405256454, now seen corresponding path program 693 times [2021-07-09 17:47:49,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497520830] [2021-07-09 17:47:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:49,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497520830] [2021-07-09 17:47:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497520830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275621257] [2021-07-09 17:47:49,770 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 [2021-07-09 17:47:49,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:47:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275621257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:50,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:50,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777737984] [2021-07-09 17:47:50,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:50,463 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) [2021-07-09 17:47:50,957 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-07-09 17:47:51,172 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-09 17:47:51,423 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2021-07-09 17:47:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:51,666 INFO L93 Difference]: Finished difference Result 1223 states and 3829 transitions. [2021-07-09 17:47:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:51,667 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 [2021-07-09 17:47:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:51,669 INFO L225 Difference]: With dead ends: 1223 [2021-07-09 17:47:51,669 INFO L226 Difference]: Without dead ends: 1223 [2021-07-09 17:47:51,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1300.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-09 17:47:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 814. [2021-07-09 17:47:51,681 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) [2021-07-09 17:47:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2671 transitions. [2021-07-09 17:47:51,682 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2671 transitions. Word has length 22 [2021-07-09 17:47:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:51,683 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2671 transitions. [2021-07-09 17:47:51,683 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) [2021-07-09 17:47:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2671 transitions. [2021-07-09 17:47:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:51,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:51,684 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:51,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8908,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:51,884 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1088651268, now seen corresponding path program 694 times [2021-07-09 17:47:51,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:51,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392664212] [2021-07-09 17:47:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:52,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392664212] [2021-07-09 17:47:52,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392664212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375524624] [2021-07-09 17:47:52,051 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 [2021-07-09 17:47:52,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:52,518 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-09 17:47:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:52,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375524624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:52,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:52,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94570745] [2021-07-09 17:47:52,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:52,782 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) [2021-07-09 17:47:53,287 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-09 17:47:53,506 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-07-09 17:47:53,701 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-07-09 17:47:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:53,935 INFO L93 Difference]: Finished difference Result 1229 states and 3836 transitions. [2021-07-09 17:47:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:53,936 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 [2021-07-09 17:47:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:53,938 INFO L225 Difference]: With dead ends: 1229 [2021-07-09 17:47:53,938 INFO L226 Difference]: Without dead ends: 1223 [2021-07-09 17:47:53,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1302.3ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-09 17:47:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-07-09 17:47:53,948 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) [2021-07-09 17:47:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2660 transitions. [2021-07-09 17:47:53,950 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2660 transitions. Word has length 22 [2021-07-09 17:47:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:53,950 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2660 transitions. [2021-07-09 17:47:53,950 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) [2021-07-09 17:47:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2660 transitions. [2021-07-09 17:47:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:53,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:53,951 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:54,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8925 [2021-07-09 17:47:54,151 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash -550795690, now seen corresponding path program 695 times [2021-07-09 17:47:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:54,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617985136] [2021-07-09 17:47:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:54,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617985136] [2021-07-09 17:47:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617985136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614646101] [2021-07-09 17:47:54,321 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 [2021-07-09 17:47:54,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:54,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:54,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:54,788 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 17:47:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614646101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:55,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:55,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:55,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057852813] [2021-07-09 17:47:55,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:55,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:55,068 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) [2021-07-09 17:47:55,561 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-07-09 17:47:55,782 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-09 17:47:55,984 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-07-09 17:47:56,157 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2021-07-09 17:47:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:56,248 INFO L93 Difference]: Finished difference Result 1193 states and 3754 transitions. [2021-07-09 17:47:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:56,248 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 [2021-07-09 17:47:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:56,250 INFO L225 Difference]: With dead ends: 1193 [2021-07-09 17:47:56,251 INFO L226 Difference]: Without dead ends: 1181 [2021-07-09 17:47:56,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1366.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-09 17:47:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 808. [2021-07-09 17:47:56,260 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) [2021-07-09 17:47:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2649 transitions. [2021-07-09 17:47:56,262 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2649 transitions. Word has length 22 [2021-07-09 17:47:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2649 transitions. [2021-07-09 17:47:56,262 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) [2021-07-09 17:47:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2649 transitions. [2021-07-09 17:47:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:56,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:56,263 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:56,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8946,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:56,464 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2071133744, now seen corresponding path program 696 times [2021-07-09 17:47:56,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:56,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815616252] [2021-07-09 17:47:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:56,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815616252] [2021-07-09 17:47:56,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815616252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119709234] [2021-07-09 17:47:56,621 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 [2021-07-09 17:47:56,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:57,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:57,161 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 8 treesize of output 1 [2021-07-09 17:47:57,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:57,194 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:47:57,194 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:57,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:57,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:57,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119709234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:57,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:57,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119043306] [2021-07-09 17:47:57,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:57,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:57,279 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) [2021-07-09 17:47:57,743 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-07-09 17:47:57,958 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-09 17:47:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:58,347 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-07-09 17:47:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:58,348 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 [2021-07-09 17:47:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:58,350 INFO L225 Difference]: With dead ends: 1301 [2021-07-09 17:47:58,350 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:47:58,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1113.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:47:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 816. [2021-07-09 17:47:58,361 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) [2021-07-09 17:47:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2685 transitions. [2021-07-09 17:47:58,362 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2685 transitions. Word has length 22 [2021-07-09 17:47:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:58,362 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2685 transitions. [2021-07-09 17:47:58,363 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) [2021-07-09 17:47:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2685 transitions. [2021-07-09 17:47:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:58,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:58,364 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:58,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8964,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:58,564 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 729925830, now seen corresponding path program 697 times [2021-07-09 17:47:58,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:58,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390342102] [2021-07-09 17:47:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:58,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:58,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390342102] [2021-07-09 17:47:58,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390342102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:58,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873907329] [2021-07-09 17:47:58,710 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 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 [2021-07-09 17:47:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:47:58,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:59,173 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-09 17:47:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:47:59,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:47:59,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:47:59,353 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:47:59,354 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:47:59,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:47:59,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:47:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:59,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873907329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:59,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:47:59,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257896600] [2021-07-09 17:47:59,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:59,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:59,437 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) [2021-07-09 17:47:59,908 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-07-09 17:48:00,119 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-07-09 17:48:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:00,497 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-07-09 17:48:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:00,497 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 [2021-07-09 17:48:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:00,500 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:48:00,500 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:48:00,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1173.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:48:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 813. [2021-07-09 17:48:00,511 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) [2021-07-09 17:48:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-07-09 17:48:00,512 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-07-09 17:48:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:00,512 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-07-09 17:48:00,512 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) [2021-07-09 17:48:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-07-09 17:48:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:00,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:00,513 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:00,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8980,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:00,714 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:00,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1319733306, now seen corresponding path program 698 times [2021-07-09 17:48:00,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:00,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500178974] [2021-07-09 17:48:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:00,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500178974] [2021-07-09 17:48:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500178974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445692427] [2021-07-09 17:48:00,872 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 [2021-07-09 17:48:01,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:01,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:01,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:48:01,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:01,459 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:48:01,459 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:01,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:48:01,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:48:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445692427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:01,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:01,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587174878] [2021-07-09 17:48:01,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:01,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:01,546 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) [2021-07-09 17:48:02,014 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-07-09 17:48:02,221 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-07-09 17:48:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:02,817 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-07-09 17:48:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:02,817 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 [2021-07-09 17:48:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:02,819 INFO L225 Difference]: With dead ends: 1296 [2021-07-09 17:48:02,819 INFO L226 Difference]: Without dead ends: 1275 [2021-07-09 17:48:02,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1276.0ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:48:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-09 17:48:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 809. [2021-07-09 17:48:02,830 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) [2021-07-09 17:48:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2654 transitions. [2021-07-09 17:48:02,831 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2654 transitions. Word has length 22 [2021-07-09 17:48:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:02,832 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2654 transitions. [2021-07-09 17:48:02,832 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) [2021-07-09 17:48:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2654 transitions. [2021-07-09 17:48:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:02,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:02,833 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:03,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9004 [2021-07-09 17:48:03,033 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1298996778, now seen corresponding path program 699 times [2021-07-09 17:48:03,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:03,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110842509] [2021-07-09 17:48:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:03,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110842509] [2021-07-09 17:48:03,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110842509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807846237] [2021-07-09 17:48:03,182 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 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 [2021-07-09 17:48:03,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:48:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:48:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:03,980 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]} [2021-07-09 17:48:03,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:03,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,126 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-09 17:48:04,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:04,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,268 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-09 17:48:04,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:04,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,409 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-09 17:48:04,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:04,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,548 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 17:48:04,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:04,555 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,682 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 17:48:04,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,688 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 12 treesize of output 8 [2021-07-09 17:48:04,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,815 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 17:48:04,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 17:48:04,829 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:04,953 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-09 17:48:04,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:04,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 17:48:04,968 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:05,112 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:48:05,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:05,123 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:48:05,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 17:48:05,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:05,239 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 17:48:05,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:05,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 9 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:48:05,244 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:157 [2021-07-09 17:48:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:05,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807846237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:05,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:05,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:48:05,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56779132] [2021-07-09 17:48:05,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:48:05,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:48:05,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:48:05,462 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) [2021-07-09 17:48:06,024 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-09 17:48:06,229 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-09 17:48:06,438 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-07-09 17:48:06,648 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-07-09 17:48:06,908 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-07-09 17:48:07,147 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2021-07-09 17:48:07,480 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-07-09 17:48:07,783 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-07-09 17:48:08,101 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-07-09 17:48:08,352 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 108 [2021-07-09 17:48:08,784 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-07-09 17:48:09,014 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-07-09 17:48:09,241 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-07-09 17:48:09,577 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2021-07-09 17:48:09,780 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-07-09 17:48:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:09,973 INFO L93 Difference]: Finished difference Result 1681 states and 5049 transitions. [2021-07-09 17:48:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:48:09,973 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 [2021-07-09 17:48:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:09,976 INFO L225 Difference]: With dead ends: 1681 [2021-07-09 17:48:09,976 INFO L226 Difference]: Without dead ends: 1572 [2021-07-09 17:48:09,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4501.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:48:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-07-09 17:48:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 835. [2021-07-09 17:48:09,988 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) [2021-07-09 17:48:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-07-09 17:48:09,990 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-07-09 17:48:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:09,990 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-07-09 17:48:09,990 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) [2021-07-09 17:48:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-07-09 17:48:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:09,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:09,991 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:10,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9019 [2021-07-09 17:48:10,192 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1080546592, now seen corresponding path program 700 times [2021-07-09 17:48:10,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:10,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35472382] [2021-07-09 17:48:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:10,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35472382] [2021-07-09 17:48:10,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35472382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696857026] [2021-07-09 17:48:10,353 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 [2021-07-09 17:48:10,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:10,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:10,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:10,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:48:10,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:10,951 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:48:10,951 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:10,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:48:10,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:48:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:11,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696857026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:11,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:11,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805989842] [2021-07-09 17:48:11,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:11,035 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) [2021-07-09 17:48:11,509 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-09 17:48:11,728 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-07-09 17:48:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:12,080 INFO L93 Difference]: Finished difference Result 1278 states and 4004 transitions. [2021-07-09 17:48:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:12,080 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 [2021-07-09 17:48:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:12,082 INFO L225 Difference]: With dead ends: 1278 [2021-07-09 17:48:12,082 INFO L226 Difference]: Without dead ends: 1278 [2021-07-09 17:48:12,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1101.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-07-09 17:48:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 833. [2021-07-09 17:48:12,093 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) [2021-07-09 17:48:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-09 17:48:12,095 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-09 17:48:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:12,095 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-09 17:48:12,095 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) [2021-07-09 17:48:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-09 17:48:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:12,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:12,096 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:12,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9040,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:12,297 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 977112902, now seen corresponding path program 701 times [2021-07-09 17:48:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:12,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31250554] [2021-07-09 17:48:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:12,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31250554] [2021-07-09 17:48:12,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31250554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219466393] [2021-07-09 17:48:12,506 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 [2021-07-09 17:48:12,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:48:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219466393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:13,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:13,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:48:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131487131] [2021-07-09 17:48:13,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:48:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:48:13,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:48:13,229 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) [2021-07-09 17:48:13,729 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 17:48:13,956 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2021-07-09 17:48:14,289 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 59 [2021-07-09 17:48:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:14,496 INFO L93 Difference]: Finished difference Result 1233 states and 3881 transitions. [2021-07-09 17:48:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:48:14,497 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 [2021-07-09 17:48:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:14,499 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 17:48:14,499 INFO L226 Difference]: Without dead ends: 1200 [2021-07-09 17:48:14,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1472.6ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:48:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-09 17:48:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 835. [2021-07-09 17:48:14,509 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) [2021-07-09 17:48:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-07-09 17:48:14,511 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-07-09 17:48:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:14,511 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-07-09 17:48:14,511 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) [2021-07-09 17:48:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-07-09 17:48:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:14,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:14,512 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:14,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9057 [2021-07-09 17:48:14,713 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1728513340, now seen corresponding path program 702 times [2021-07-09 17:48:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627283814] [2021-07-09 17:48:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:14,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627283814] [2021-07-09 17:48:14,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627283814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044652614] [2021-07-09 17:48:14,913 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 [2021-07-09 17:48:15,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:48:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:15,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:15,584 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 8 treesize of output 1 [2021-07-09 17:48:15,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:15,600 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-09 17:48:15,600 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:15,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:48:15,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-09 17:48:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044652614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:15,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:15,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234019448] [2021-07-09 17:48:15,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:15,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:15,652 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) [2021-07-09 17:48:16,128 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-07-09 17:48:16,345 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-07-09 17:48:16,635 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2021-07-09 17:48:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:16,879 INFO L93 Difference]: Finished difference Result 1214 states and 3839 transitions. [2021-07-09 17:48:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:48:16,880 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 [2021-07-09 17:48:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:16,882 INFO L225 Difference]: With dead ends: 1214 [2021-07-09 17:48:16,882 INFO L226 Difference]: Without dead ends: 1208 [2021-07-09 17:48:16,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1373.6ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:48:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-09 17:48:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 833. [2021-07-09 17:48:16,892 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) [2021-07-09 17:48:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-09 17:48:16,894 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-09 17:48:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:16,894 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-09 17:48:16,894 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) [2021-07-09 17:48:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-09 17:48:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:16,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:16,895 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:17,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9072,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:17,095 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1477931050, now seen corresponding path program 703 times [2021-07-09 17:48:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:17,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550722201] [2021-07-09 17:48:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550722201] [2021-07-09 17:48:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550722201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090031370] [2021-07-09 17:48:17,224 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 [2021-07-09 17:48:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:17,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090031370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:17,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:17,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:17,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015760106] [2021-07-09 17:48:17,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:17,839 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) [2021-07-09 17:48:18,319 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-09 17:48:18,606 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-07-09 17:48:18,769 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 63 [2021-07-09 17:48:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:18,951 INFO L93 Difference]: Finished difference Result 1201 states and 3804 transitions. [2021-07-09 17:48:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:18,951 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 [2021-07-09 17:48:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:18,953 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 17:48:18,953 INFO L226 Difference]: Without dead ends: 1183 [2021-07-09 17:48:18,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1203.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-09 17:48:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-07-09 17:48:18,963 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) [2021-07-09 17:48:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2750 transitions. [2021-07-09 17:48:18,965 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2750 transitions. Word has length 22 [2021-07-09 17:48:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:18,965 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2750 transitions. [2021-07-09 17:48:18,965 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) [2021-07-09 17:48:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2750 transitions. [2021-07-09 17:48:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:18,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:18,966 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:19,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9098,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:19,166 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash 340646048, now seen corresponding path program 704 times [2021-07-09 17:48:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:19,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498266839] [2021-07-09 17:48:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:19,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498266839] [2021-07-09 17:48:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498266839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828029238] [2021-07-09 17:48:19,322 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 [2021-07-09 17:48:19,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:19,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828029238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:19,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:19,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630523205] [2021-07-09 17:48:19,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:19,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:19,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:19,946 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) [2021-07-09 17:48:20,439 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-07-09 17:48:20,662 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-07-09 17:48:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:21,006 INFO L93 Difference]: Finished difference Result 1195 states and 3789 transitions. [2021-07-09 17:48:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:21,007 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 [2021-07-09 17:48:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:21,009 INFO L225 Difference]: With dead ends: 1195 [2021-07-09 17:48:21,009 INFO L226 Difference]: Without dead ends: 1183 [2021-07-09 17:48:21,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-09 17:48:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-07-09 17:48:21,019 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) [2021-07-09 17:48:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2748 transitions. [2021-07-09 17:48:21,020 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2748 transitions. Word has length 22 [2021-07-09 17:48:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:21,020 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2748 transitions. [2021-07-09 17:48:21,020 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) [2021-07-09 17:48:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2748 transitions. [2021-07-09 17:48:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:21,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:21,021 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:21,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9111,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:21,222 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1092046486, now seen corresponding path program 705 times [2021-07-09 17:48:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688667707] [2021-07-09 17:48:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:21,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:21,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688667707] [2021-07-09 17:48:21,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688667707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:21,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106871254] [2021-07-09 17:48:21,363 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 [2021-07-09 17:48:21,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:48:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:48:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:22,019 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 13 treesize of output 9 [2021-07-09 17:48:22,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:22,028 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 17:48:22,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,171 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 17:48:22,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:22,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 17:48:22,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 17:48:22,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:22,264 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 5 treesize of output 3 [2021-07-09 17:48:22,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:48:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 17:48:22,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:22,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:22,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:48:22,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:207, output treesize:84 [2021-07-09 17:48:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106871254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:22,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:22,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:48:22,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952487188] [2021-07-09 17:48:22,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:48:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:48:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:48:22,484 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) [2021-07-09 17:48:23,017 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-09 17:48:23,222 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-09 17:48:23,373 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-09 17:48:23,654 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 17:48:23,947 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-07-09 17:48:24,099 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-09 17:48:24,317 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-09 17:48:24,484 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-07-09 17:48:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:24,517 INFO L93 Difference]: Finished difference Result 1371 states and 4260 transitions. [2021-07-09 17:48:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:24,517 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 [2021-07-09 17:48:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:24,519 INFO L225 Difference]: With dead ends: 1371 [2021-07-09 17:48:24,519 INFO L226 Difference]: Without dead ends: 1344 [2021-07-09 17:48:24,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2164.5ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:48:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-09 17:48:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 833. [2021-07-09 17:48:24,531 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) [2021-07-09 17:48:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2746 transitions. [2021-07-09 17:48:24,533 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2746 transitions. Word has length 22 [2021-07-09 17:48:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:24,533 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2746 transitions. [2021-07-09 17:48:24,533 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) [2021-07-09 17:48:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2746 transitions. [2021-07-09 17:48:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:24,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:24,534 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:24,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9125 [2021-07-09 17:48:24,734 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -823377440, now seen corresponding path program 706 times [2021-07-09 17:48:24,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:24,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765130617] [2021-07-09 17:48:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:24,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765130617] [2021-07-09 17:48:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765130617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908993741] [2021-07-09 17:48:24,878 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 [2021-07-09 17:48:25,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:25,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:25,296 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-09 17:48:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:48:25,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:25,482 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-09 17:48:25,482 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:25,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:48:25,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-09 17:48:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:25,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908993741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:25,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:25,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804804764] [2021-07-09 17:48:25,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:25,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:25,533 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) [2021-07-09 17:48:26,026 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-07-09 17:48:26,296 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-09 17:48:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:26,594 INFO L93 Difference]: Finished difference Result 1189 states and 3780 transitions. [2021-07-09 17:48:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:26,594 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 [2021-07-09 17:48:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:26,596 INFO L225 Difference]: With dead ends: 1189 [2021-07-09 17:48:26,596 INFO L226 Difference]: Without dead ends: 1189 [2021-07-09 17:48:26,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1148.7ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-07-09 17:48:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 829. [2021-07-09 17:48:26,606 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) [2021-07-09 17:48:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2736 transitions. [2021-07-09 17:48:26,607 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2736 transitions. Word has length 22 [2021-07-09 17:48:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:26,607 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2736 transitions. [2021-07-09 17:48:26,608 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) [2021-07-09 17:48:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2736 transitions. [2021-07-09 17:48:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:26,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:26,609 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:26,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9166 [2021-07-09 17:48:26,809 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -757398910, now seen corresponding path program 707 times [2021-07-09 17:48:26,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:26,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723922314] [2021-07-09 17:48:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:26,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:26,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723922314] [2021-07-09 17:48:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723922314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:26,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331749223] [2021-07-09 17:48:26,945 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 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 [2021-07-09 17:48:27,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:48:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:27,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:27,330 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-09 17:48:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:27,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331749223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:27,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:27,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:27,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436880946] [2021-07-09 17:48:27,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:27,593 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) [2021-07-09 17:48:27,941 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-07-09 17:48:28,125 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-07-09 17:48:28,327 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2021-07-09 17:48:28,514 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-07-09 17:48:28,682 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2021-07-09 17:48:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:28,872 INFO L93 Difference]: Finished difference Result 1414 states and 4401 transitions. [2021-07-09 17:48:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:28,872 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 [2021-07-09 17:48:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:28,875 INFO L225 Difference]: With dead ends: 1414 [2021-07-09 17:48:28,875 INFO L226 Difference]: Without dead ends: 1414 [2021-07-09 17:48:28,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1356.2ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-09 17:48:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 842. [2021-07-09 17:48:28,887 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) [2021-07-09 17:48:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2785 transitions. [2021-07-09 17:48:28,889 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2785 transitions. Word has length 22 [2021-07-09 17:48:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:28,889 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2785 transitions. [2021-07-09 17:48:28,889 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) [2021-07-09 17:48:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2785 transitions. [2021-07-09 17:48:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:28,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:28,890 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:29,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9191,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:29,090 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2043660664, now seen corresponding path program 708 times [2021-07-09 17:48:29,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:29,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556535359] [2021-07-09 17:48:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:29,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556535359] [2021-07-09 17:48:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556535359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916879942] [2021-07-09 17:48:29,219 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 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 [2021-07-09 17:48:29,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:48:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916879942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:29,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:29,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247705558] [2021-07-09 17:48:29,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:29,858 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) [2021-07-09 17:48:30,245 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-07-09 17:48:30,430 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2021-07-09 17:48:30,624 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2021-07-09 17:48:30,866 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-09 17:48:31,034 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-07-09 17:48:31,213 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-07-09 17:48:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:31,251 INFO L93 Difference]: Finished difference Result 1420 states and 4408 transitions. [2021-07-09 17:48:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:31,251 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 [2021-07-09 17:48:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:31,253 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 17:48:31,253 INFO L226 Difference]: Without dead ends: 1414 [2021-07-09 17:48:31,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1416.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-09 17:48:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 839. [2021-07-09 17:48:31,268 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) [2021-07-09 17:48:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2774 transitions. [2021-07-09 17:48:31,269 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2774 transitions. Word has length 22 [2021-07-09 17:48:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:31,269 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2774 transitions. [2021-07-09 17:48:31,269 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) [2021-07-09 17:48:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2774 transitions. [2021-07-09 17:48:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:31,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:31,270 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:31,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9207,733 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:31,471 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:31,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1713451054, now seen corresponding path program 709 times [2021-07-09 17:48:31,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:31,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465105564] [2021-07-09 17:48:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:31,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465105564] [2021-07-09 17:48:31,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465105564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123118827] [2021-07-09 17:48:31,612 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 [2021-07-09 17:48:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:32,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123118827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:32,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:32,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:32,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770876982] [2021-07-09 17:48:32,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:32,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:32,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:32,208 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) [2021-07-09 17:48:32,540 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-07-09 17:48:32,721 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-09 17:48:32,912 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2021-07-09 17:48:33,105 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2021-07-09 17:48:33,253 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2021-07-09 17:48:33,423 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2021-07-09 17:48:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:33,444 INFO L93 Difference]: Finished difference Result 1384 states and 4326 transitions. [2021-07-09 17:48:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:33,444 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 [2021-07-09 17:48:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:33,447 INFO L225 Difference]: With dead ends: 1384 [2021-07-09 17:48:33,447 INFO L226 Difference]: Without dead ends: 1372 [2021-07-09 17:48:33,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1336.6ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-09 17:48:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 836. [2021-07-09 17:48:33,458 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) [2021-07-09 17:48:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2763 transitions. [2021-07-09 17:48:33,460 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2763 transitions. Word has length 22 [2021-07-09 17:48:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:33,460 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2763 transitions. [2021-07-09 17:48:33,460 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) [2021-07-09 17:48:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2763 transitions. [2021-07-09 17:48:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:33,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:33,461 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:33,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9225 [2021-07-09 17:48:33,662 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2075169976, now seen corresponding path program 710 times [2021-07-09 17:48:33,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:33,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946375686] [2021-07-09 17:48:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:33,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:33,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946375686] [2021-07-09 17:48:33,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946375686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:33,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840327348] [2021-07-09 17:48:33,810 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 [2021-07-09 17:48:33,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840327348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:34,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186526206] [2021-07-09 17:48:34,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:34,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:34,364 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) [2021-07-09 17:48:34,703 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 17:48:34,883 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-07-09 17:48:35,073 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-07-09 17:48:35,241 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-07-09 17:48:35,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2021-07-09 17:48:35,532 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-07-09 17:48:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:35,555 INFO L93 Difference]: Finished difference Result 1381 states and 4315 transitions. [2021-07-09 17:48:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:35,555 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 [2021-07-09 17:48:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:35,558 INFO L225 Difference]: With dead ends: 1381 [2021-07-09 17:48:35,558 INFO L226 Difference]: Without dead ends: 1363 [2021-07-09 17:48:35,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1257.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-07-09 17:48:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 833. [2021-07-09 17:48:35,570 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) [2021-07-09 17:48:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-07-09 17:48:35,571 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-07-09 17:48:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:35,571 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-07-09 17:48:35,571 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) [2021-07-09 17:48:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-07-09 17:48:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:35,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:35,572 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:35,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9237 [2021-07-09 17:48:35,773 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1179561522, now seen corresponding path program 711 times [2021-07-09 17:48:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:35,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71075319] [2021-07-09 17:48:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:35,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:35,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71075319] [2021-07-09 17:48:35,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71075319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:35,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394232526] [2021-07-09 17:48:35,902 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 [2021-07-09 17:48:36,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:48:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394232526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734651814] [2021-07-09 17:48:36,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:36,438 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) [2021-07-09 17:48:36,800 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 17:48:36,983 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-07-09 17:48:37,293 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2021-07-09 17:48:37,440 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2021-07-09 17:48:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:37,596 INFO L93 Difference]: Finished difference Result 1419 states and 4388 transitions. [2021-07-09 17:48:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:37,596 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 [2021-07-09 17:48:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:37,598 INFO L225 Difference]: With dead ends: 1419 [2021-07-09 17:48:37,598 INFO L226 Difference]: Without dead ends: 1395 [2021-07-09 17:48:37,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1153.3ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-09 17:48:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 830. [2021-07-09 17:48:37,610 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) [2021-07-09 17:48:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2741 transitions. [2021-07-09 17:48:37,611 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2741 transitions. Word has length 22 [2021-07-09 17:48:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2741 transitions. [2021-07-09 17:48:37,612 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) [2021-07-09 17:48:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2741 transitions. [2021-07-09 17:48:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:37,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:37,613 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:37,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9254 [2021-07-09 17:48:37,813 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 381531912, now seen corresponding path program 712 times [2021-07-09 17:48:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:37,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886084613] [2021-07-09 17:48:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:37,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886084613] [2021-07-09 17:48:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886084613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217546083] [2021-07-09 17:48:37,947 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 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 [2021-07-09 17:48:38,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:38,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:38,348 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 17:48:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:38,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217546083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:38,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:38,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:38,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058841843] [2021-07-09 17:48:38,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:38,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:38,658 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) [2021-07-09 17:48:39,007 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-07-09 17:48:39,222 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:48:39,424 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2021-07-09 17:48:39,609 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-07-09 17:48:39,784 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-07-09 17:48:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:39,964 INFO L93 Difference]: Finished difference Result 1341 states and 4208 transitions. [2021-07-09 17:48:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:39,964 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 [2021-07-09 17:48:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:39,966 INFO L225 Difference]: With dead ends: 1341 [2021-07-09 17:48:39,966 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:48:39,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1403.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:48:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 840. [2021-07-09 17:48:39,978 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) [2021-07-09 17:48:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2779 transitions. [2021-07-09 17:48:39,979 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2779 transitions. Word has length 22 [2021-07-09 17:48:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:39,979 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2779 transitions. [2021-07-09 17:48:39,979 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) [2021-07-09 17:48:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2779 transitions. [2021-07-09 17:48:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:39,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:39,980 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:40,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9275,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:40,181 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1112375810, now seen corresponding path program 713 times [2021-07-09 17:48:40,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:40,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466981007] [2021-07-09 17:48:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:40,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:40,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466981007] [2021-07-09 17:48:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466981007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:40,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211424553] [2021-07-09 17:48:40,310 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 [2021-07-09 17:48:40,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:48:40,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:40,706 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 17:48:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211424553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:41,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550410112] [2021-07-09 17:48:41,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:41,027 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) [2021-07-09 17:48:41,375 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-09 17:48:41,590 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-09 17:48:41,788 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-07-09 17:48:41,973 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-07-09 17:48:42,147 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-07-09 17:48:42,393 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-09 17:48:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:42,433 INFO L93 Difference]: Finished difference Result 1347 states and 4215 transitions. [2021-07-09 17:48:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:42,433 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 [2021-07-09 17:48:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:42,435 INFO L225 Difference]: With dead ends: 1347 [2021-07-09 17:48:42,435 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:48:42,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1515.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:48:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 837. [2021-07-09 17:48:42,447 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) [2021-07-09 17:48:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2768 transitions. [2021-07-09 17:48:42,449 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2768 transitions. Word has length 22 [2021-07-09 17:48:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:42,449 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2768 transitions. [2021-07-09 17:48:42,449 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) [2021-07-09 17:48:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2768 transitions. [2021-07-09 17:48:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:42,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:42,450 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:42,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9295 [2021-07-09 17:48:42,650 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -574520232, now seen corresponding path program 714 times [2021-07-09 17:48:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:42,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243447556] [2021-07-09 17:48:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:42,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243447556] [2021-07-09 17:48:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243447556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731215000] [2021-07-09 17:48:42,794 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 [2021-07-09 17:48:42,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:48:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:43,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731215000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:43,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:43,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:43,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123826297] [2021-07-09 17:48:43,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:43,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:43,464 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) [2021-07-09 17:48:43,851 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:48:44,077 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-07-09 17:48:44,339 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-07-09 17:48:44,535 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-07-09 17:48:44,692 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2021-07-09 17:48:44,871 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-09 17:48:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:44,887 INFO L93 Difference]: Finished difference Result 1311 states and 4133 transitions. [2021-07-09 17:48:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:44,887 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 [2021-07-09 17:48:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:44,889 INFO L225 Difference]: With dead ends: 1311 [2021-07-09 17:48:44,889 INFO L226 Difference]: Without dead ends: 1299 [2021-07-09 17:48:44,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1491.6ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-09 17:48:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 834. [2021-07-09 17:48:44,901 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) [2021-07-09 17:48:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2757 transitions. [2021-07-09 17:48:44,902 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2757 transitions. Word has length 22 [2021-07-09 17:48:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2757 transitions. [2021-07-09 17:48:44,902 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) [2021-07-09 17:48:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2757 transitions. [2021-07-09 17:48:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:44,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:44,903 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:45,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9316,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:45,104 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1080866498, now seen corresponding path program 715 times [2021-07-09 17:48:45,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:45,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038972195] [2021-07-09 17:48:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:45,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038972195] [2021-07-09 17:48:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038972195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986274270] [2021-07-09 17:48:45,235 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 [2021-07-09 17:48:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:45,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986274270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:45,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:45,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:45,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667948747] [2021-07-09 17:48:45,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:45,882 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) [2021-07-09 17:48:46,218 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-09 17:48:46,427 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-09 17:48:46,627 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2021-07-09 17:48:46,790 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 53 [2021-07-09 17:48:46,946 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-09 17:48:47,117 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-07-09 17:48:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:47,131 INFO L93 Difference]: Finished difference Result 1308 states and 4122 transitions. [2021-07-09 17:48:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:47,131 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 [2021-07-09 17:48:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:47,133 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 17:48:47,133 INFO L226 Difference]: Without dead ends: 1290 [2021-07-09 17:48:47,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1369.8ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-07-09 17:48:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 831. [2021-07-09 17:48:47,144 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) [2021-07-09 17:48:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2746 transitions. [2021-07-09 17:48:47,145 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2746 transitions. Word has length 22 [2021-07-09 17:48:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:47,145 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2746 transitions. [2021-07-09 17:48:47,146 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) [2021-07-09 17:48:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2746 transitions. [2021-07-09 17:48:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:47,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:47,147 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:47,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9341 [2021-07-09 17:48:47,347 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:47,347 INFO L82 PathProgramCache]: Analyzing trace with hash 922847102, now seen corresponding path program 716 times [2021-07-09 17:48:47,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:47,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052951592] [2021-07-09 17:48:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:47,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:47,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052951592] [2021-07-09 17:48:47,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052951592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:47,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413745946] [2021-07-09 17:48:47,507 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 [2021-07-09 17:48:47,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:48,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413745946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:48,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:48,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882755434] [2021-07-09 17:48:48,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:48,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:48,189 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) [2021-07-09 17:48:48,523 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-09 17:48:48,733 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-07-09 17:48:48,954 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-07-09 17:48:49,141 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-07-09 17:48:49,327 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:48:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:49,502 INFO L93 Difference]: Finished difference Result 1341 states and 4205 transitions. [2021-07-09 17:48:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:49,502 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 [2021-07-09 17:48:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:49,505 INFO L225 Difference]: With dead ends: 1341 [2021-07-09 17:48:49,505 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:48:49,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1430.0ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:48:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 838. [2021-07-09 17:48:49,517 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) [2021-07-09 17:48:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2773 transitions. [2021-07-09 17:48:49,518 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2773 transitions. Word has length 22 [2021-07-09 17:48:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:49,518 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2773 transitions. [2021-07-09 17:48:49,518 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) [2021-07-09 17:48:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2773 transitions. [2021-07-09 17:48:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:49,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:49,519 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:49,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9361,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:49,720 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash -571060620, now seen corresponding path program 717 times [2021-07-09 17:48:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:49,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792589425] [2021-07-09 17:48:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:49,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:49,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792589425] [2021-07-09 17:48:49,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792589425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:49,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687389602] [2021-07-09 17:48:49,878 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 [2021-07-09 17:48:50,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:48:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687389602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:50,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:50,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837571328] [2021-07-09 17:48:50,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:50,565 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) [2021-07-09 17:48:50,881 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-07-09 17:48:51,091 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-07-09 17:48:51,315 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-09 17:48:51,503 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-07-09 17:48:51,695 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-07-09 17:48:51,884 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-07-09 17:48:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:51,915 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-07-09 17:48:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:51,915 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 [2021-07-09 17:48:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:51,917 INFO L225 Difference]: With dead ends: 1347 [2021-07-09 17:48:51,917 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 17:48:51,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1506.7ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 17:48:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 835. [2021-07-09 17:48:51,929 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) [2021-07-09 17:48:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2762 transitions. [2021-07-09 17:48:51,930 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2762 transitions. Word has length 22 [2021-07-09 17:48:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:51,930 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2762 transitions. [2021-07-09 17:48:51,930 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) [2021-07-09 17:48:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2762 transitions. [2021-07-09 17:48:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:51,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:51,931 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:52,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-07-09 17:48:52,132 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash -33205042, now seen corresponding path program 718 times [2021-07-09 17:48:52,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:52,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483406135] [2021-07-09 17:48:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:52,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483406135] [2021-07-09 17:48:52,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483406135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:52,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117860115] [2021-07-09 17:48:52,299 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 [2021-07-09 17:48:52,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:52,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:52,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:52,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:52,683 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-09 17:48:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117860115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:53,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776946109] [2021-07-09 17:48:53,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:53,043 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) [2021-07-09 17:48:53,462 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-09 17:48:53,675 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-07-09 17:48:53,902 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-07-09 17:48:54,099 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2021-07-09 17:48:54,269 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2021-07-09 17:48:54,445 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-07-09 17:48:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:54,460 INFO L93 Difference]: Finished difference Result 1311 states and 4130 transitions. [2021-07-09 17:48:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:54,460 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 [2021-07-09 17:48:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:54,462 INFO L225 Difference]: With dead ends: 1311 [2021-07-09 17:48:54,462 INFO L226 Difference]: Without dead ends: 1299 [2021-07-09 17:48:54,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-09 17:48:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 832. [2021-07-09 17:48:54,473 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) [2021-07-09 17:48:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-07-09 17:48:54,475 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-07-09 17:48:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:54,475 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-07-09 17:48:54,475 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) [2021-07-09 17:48:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-07-09 17:48:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:54,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:54,476 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:54,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9391,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:54,677 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1553543096, now seen corresponding path program 719 times [2021-07-09 17:48:54,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:54,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319557080] [2021-07-09 17:48:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319557080] [2021-07-09 17:48:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319557080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985604788] [2021-07-09 17:48:54,824 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 [2021-07-09 17:48:54,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:48:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:55,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:55,400 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 8 treesize of output 1 [2021-07-09 17:48:55,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:55,433 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:48:55,433 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:55,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:48:55,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:48:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985604788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:55,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:55,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079309895] [2021-07-09 17:48:55,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:55,513 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) [2021-07-09 17:48:55,865 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-07-09 17:48:56,084 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-07-09 17:48:56,316 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-07-09 17:48:56,524 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-07-09 17:48:56,708 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-07-09 17:48:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:56,907 INFO L93 Difference]: Finished difference Result 1416 states and 4390 transitions. [2021-07-09 17:48:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:56,908 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 [2021-07-09 17:48:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:56,910 INFO L225 Difference]: With dead ends: 1416 [2021-07-09 17:48:56,910 INFO L226 Difference]: Without dead ends: 1416 [2021-07-09 17:48:56,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1415.7ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-09 17:48:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 840. [2021-07-09 17:48:56,922 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) [2021-07-09 17:48:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2787 transitions. [2021-07-09 17:48:56,923 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2787 transitions. Word has length 22 [2021-07-09 17:48:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:56,923 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2787 transitions. [2021-07-09 17:48:56,923 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) [2021-07-09 17:48:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2787 transitions. [2021-07-09 17:48:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:56,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:56,925 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:57,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9409,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:57,125 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1247516478, now seen corresponding path program 720 times [2021-07-09 17:48:57,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:57,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968106723] [2021-07-09 17:48:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968106723] [2021-07-09 17:48:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968106723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629180647] [2021-07-09 17:48:57,269 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 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 [2021-07-09 17:48:57,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:48:57,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:57,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:57,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:48:57,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:57,873 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:48:57,873 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:48:57,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:48:57,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:48:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629180647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:57,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:48:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740262629] [2021-07-09 17:48:57,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:57,953 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) [2021-07-09 17:48:58,278 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-07-09 17:48:58,482 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-07-09 17:48:58,696 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-09 17:48:58,895 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-09 17:48:59,081 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-07-09 17:48:59,278 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-09 17:48:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:59,321 INFO L93 Difference]: Finished difference Result 1422 states and 4391 transitions. [2021-07-09 17:48:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:48:59,321 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 [2021-07-09 17:48:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:59,324 INFO L225 Difference]: With dead ends: 1422 [2021-07-09 17:48:59,324 INFO L226 Difference]: Without dead ends: 1416 [2021-07-09 17:48:59,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1449.3ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:48:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-07-09 17:48:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 837. [2021-07-09 17:48:59,336 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) [2021-07-09 17:48:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2776 transitions. [2021-07-09 17:48:59,337 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2776 transitions. Word has length 22 [2021-07-09 17:48:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:59,337 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2776 transitions. [2021-07-09 17:48:59,338 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) [2021-07-09 17:48:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2776 transitions. [2021-07-09 17:48:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:48:59,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:59,339 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:59,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9426 [2021-07-09 17:48:59,539 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -802142658, now seen corresponding path program 721 times [2021-07-09 17:48:59,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:59,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972211163] [2021-07-09 17:48:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:59,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972211163] [2021-07-09 17:48:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972211163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668618969] [2021-07-09 17:48:59,734 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 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 [2021-07-09 17:48:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:00,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:00,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:00,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:00,332 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-07-09 17:49:00,332 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-07-09 17:49:00,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:49:00,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-07-09 17:49:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668618969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:00,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:00,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384821755] [2021-07-09 17:49:00,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:00,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:00,417 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) [2021-07-09 17:49:00,712 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-07-09 17:49:00,924 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:49:01,135 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-07-09 17:49:01,333 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-09 17:49:01,751 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 55 [2021-07-09 17:49:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:01,925 INFO L93 Difference]: Finished difference Result 1411 states and 4375 transitions. [2021-07-09 17:49:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:49:01,925 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 [2021-07-09 17:49:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:01,928 INFO L225 Difference]: With dead ends: 1411 [2021-07-09 17:49:01,928 INFO L226 Difference]: Without dead ends: 1390 [2021-07-09 17:49:01,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1621.3ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:49:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-09 17:49:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 833. [2021-07-09 17:49:01,940 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) [2021-07-09 17:49:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-09 17:49:01,941 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-09 17:49:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:01,941 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-09 17:49:01,941 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) [2021-07-09 17:49:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-09 17:49:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:01,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:01,943 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:02,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9444 [2021-07-09 17:49:02,143 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash -781406130, now seen corresponding path program 722 times [2021-07-09 17:49:02,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:02,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465305823] [2021-07-09 17:49:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:02,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:02,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465305823] [2021-07-09 17:49:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465305823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:02,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486464397] [2021-07-09 17:49:02,289 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 [2021-07-09 17:49:02,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:02,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:02,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:02,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:02,883 INFO L628 ElimStorePlain]: treesize reduction 166, result has 14.0 percent of original size [2021-07-09 17:49:02,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_772 vanished before elimination [2021-07-09 17:49:02,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_773 vanished before elimination [2021-07-09 17:49:02,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-07-09 17:49:02,884 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:02,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:49:02,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:220, output treesize:27 [2021-07-09 17:49:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486464397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:02,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:02,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811955502] [2021-07-09 17:49:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:02,961 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) [2021-07-09 17:49:03,319 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 17:49:03,554 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-07-09 17:49:03,782 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-07-09 17:49:03,998 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-07-09 17:49:04,218 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-07-09 17:49:04,421 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-07-09 17:49:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:04,544 INFO L93 Difference]: Finished difference Result 1367 states and 4273 transitions. [2021-07-09 17:49:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:04,544 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 [2021-07-09 17:49:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:04,547 INFO L225 Difference]: With dead ends: 1367 [2021-07-09 17:49:04,547 INFO L226 Difference]: Without dead ends: 1361 [2021-07-09 17:49:04,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1535.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:49:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-07-09 17:49:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 833. [2021-07-09 17:49:04,559 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) [2021-07-09 17:49:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-09 17:49:04,560 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-09 17:49:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:04,560 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-09 17:49:04,560 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) [2021-07-09 17:49:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-09 17:49:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:04,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:04,561 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:04,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9460,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:04,762 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1494703550, now seen corresponding path program 723 times [2021-07-09 17:49:04,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:04,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165153310] [2021-07-09 17:49:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:04,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165153310] [2021-07-09 17:49:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165153310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801745486] [2021-07-09 17:49:04,935 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 [2021-07-09 17:49:05,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:49:05,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:05,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801745486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:05,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:05,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523030037] [2021-07-09 17:49:05,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:05,628 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) [2021-07-09 17:49:05,979 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-07-09 17:49:06,194 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:49:06,425 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-07-09 17:49:06,706 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-07-09 17:49:06,859 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2021-07-09 17:49:07,038 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-07-09 17:49:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:07,054 INFO L93 Difference]: Finished difference Result 1305 states and 4119 transitions. [2021-07-09 17:49:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:07,054 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 [2021-07-09 17:49:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:07,056 INFO L225 Difference]: With dead ends: 1305 [2021-07-09 17:49:07,056 INFO L226 Difference]: Without dead ends: 1293 [2021-07-09 17:49:07,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1567.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-07-09 17:49:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 835. [2021-07-09 17:49:07,067 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) [2021-07-09 17:49:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-09 17:49:07,069 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-09 17:49:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:07,069 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-09 17:49:07,069 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) [2021-07-09 17:49:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-09 17:49:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:07,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:07,070 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:07,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9479 [2021-07-09 17:49:07,271 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2048863308, now seen corresponding path program 724 times [2021-07-09 17:49:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:07,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065487915] [2021-07-09 17:49:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:07,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:07,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065487915] [2021-07-09 17:49:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065487915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:07,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326810160] [2021-07-09 17:49:07,450 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 [2021-07-09 17:49:07,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:08,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:08,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:08,110 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-07-09 17:49:08,110 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:08,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:08,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-07-09 17:49:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:08,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326810160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:08,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:08,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:08,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299827329] [2021-07-09 17:49:08,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:08,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:08,159 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) [2021-07-09 17:49:08,498 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:49:08,724 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-07-09 17:49:08,960 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-07-09 17:49:09,181 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-07-09 17:49:09,372 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-09 17:49:09,561 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 17:49:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:09,675 INFO L93 Difference]: Finished difference Result 1307 states and 4126 transitions. [2021-07-09 17:49:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:09,675 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 [2021-07-09 17:49:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:09,677 INFO L225 Difference]: With dead ends: 1307 [2021-07-09 17:49:09,677 INFO L226 Difference]: Without dead ends: 1301 [2021-07-09 17:49:09,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1611.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:49:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-07-09 17:49:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 833. [2021-07-09 17:49:09,689 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) [2021-07-09 17:49:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-09 17:49:09,691 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-09 17:49:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:09,691 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-09 17:49:09,691 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) [2021-07-09 17:49:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-09 17:49:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:09,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:09,692 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:09,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9496,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:09,892 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash -960340402, now seen corresponding path program 725 times [2021-07-09 17:49:09,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:09,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037437519] [2021-07-09 17:49:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:10,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:10,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037437519] [2021-07-09 17:49:10,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037437519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:10,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527216308] [2021-07-09 17:49:10,016 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 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 [2021-07-09 17:49:10,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:49:10,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527216308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:10,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:10,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:10,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760216808] [2021-07-09 17:49:10,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:10,624 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) [2021-07-09 17:49:10,969 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-07-09 17:49:11,191 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-07-09 17:49:11,477 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-07-09 17:49:11,634 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-07-09 17:49:11,795 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-07-09 17:49:11,973 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:49:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:11,988 INFO L93 Difference]: Finished difference Result 1302 states and 4111 transitions. [2021-07-09 17:49:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:11,988 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 [2021-07-09 17:49:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:11,990 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 17:49:11,990 INFO L226 Difference]: Without dead ends: 1284 [2021-07-09 17:49:11,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1414.1ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-07-09 17:49:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 835. [2021-07-09 17:49:12,001 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) [2021-07-09 17:49:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-09 17:49:12,003 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-09 17:49:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:12,003 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-09 17:49:12,003 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) [2021-07-09 17:49:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-09 17:49:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:12,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:12,004 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:12,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9528,750 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:12,204 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 858236696, now seen corresponding path program 726 times [2021-07-09 17:49:12,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:12,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838436774] [2021-07-09 17:49:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:12,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838436774] [2021-07-09 17:49:12,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838436774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880385642] [2021-07-09 17:49:12,354 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 [2021-07-09 17:49:12,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:49:12,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:12,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:12,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880385642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:12,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:12,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:12,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164006071] [2021-07-09 17:49:12,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:12,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:12,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:12,954 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) [2021-07-09 17:49:13,306 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-09 17:49:13,530 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-07-09 17:49:13,755 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-07-09 17:49:13,947 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2021-07-09 17:49:14,091 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2021-07-09 17:49:14,268 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-07-09 17:49:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:14,283 INFO L93 Difference]: Finished difference Result 1298 states and 4103 transitions. [2021-07-09 17:49:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:14,283 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 [2021-07-09 17:49:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:14,285 INFO L225 Difference]: With dead ends: 1298 [2021-07-09 17:49:14,285 INFO L226 Difference]: Without dead ends: 1286 [2021-07-09 17:49:14,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1402.2ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-07-09 17:49:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 837. [2021-07-09 17:49:14,296 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) [2021-07-09 17:49:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-07-09 17:49:14,298 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-07-09 17:49:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:14,298 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-07-09 17:49:14,298 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) [2021-07-09 17:49:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-07-09 17:49:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:14,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:14,299 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:14,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 751 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9546 [2021-07-09 17:49:14,499 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637134, now seen corresponding path program 727 times [2021-07-09 17:49:14,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:14,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745675944] [2021-07-09 17:49:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:14,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745675944] [2021-07-09 17:49:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745675944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892898702] [2021-07-09 17:49:14,641 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 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 [2021-07-09 17:49:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:15,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:15,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:15,261 INFO L628 ElimStorePlain]: treesize reduction 79, result has 13.2 percent of original size [2021-07-09 17:49:15,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-07-09 17:49:15,261 INFO L518 ElimStorePlain]: Eliminatee v_prenex_809 vanished before elimination [2021-07-09 17:49:15,261 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:15,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:15,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:112, output treesize:12 [2021-07-09 17:49:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:15,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892898702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:15,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:15,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:15,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806545162] [2021-07-09 17:49:15,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:15,311 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) [2021-07-09 17:49:15,662 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:49:15,879 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:49:16,159 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-07-09 17:49:16,421 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-07-09 17:49:16,608 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-09 17:49:16,799 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 17:49:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:16,911 INFO L93 Difference]: Finished difference Result 1300 states and 4110 transitions. [2021-07-09 17:49:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:16,911 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 [2021-07-09 17:49:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:16,913 INFO L225 Difference]: With dead ends: 1300 [2021-07-09 17:49:16,913 INFO L226 Difference]: Without dead ends: 1294 [2021-07-09 17:49:16,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1657.9ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:49:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-07-09 17:49:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 833. [2021-07-09 17:49:16,924 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) [2021-07-09 17:49:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-07-09 17:49:16,925 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-07-09 17:49:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:16,925 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-07-09 17:49:16,925 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) [2021-07-09 17:49:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-07-09 17:49:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:16,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:16,927 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:17,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9564 [2021-07-09 17:49:17,127 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1738219842, now seen corresponding path program 728 times [2021-07-09 17:49:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:17,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569185052] [2021-07-09 17:49:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:17,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569185052] [2021-07-09 17:49:17,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569185052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018797945] [2021-07-09 17:49:17,269 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 [2021-07-09 17:49:17,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:17,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:17,677 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 17:49:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018797945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:17,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328925861] [2021-07-09 17:49:17,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:17,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:17,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:17,891 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) [2021-07-09 17:49:18,230 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:49:18,486 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-09 17:49:18,792 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2021-07-09 17:49:18,924 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-07-09 17:49:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:19,079 INFO L93 Difference]: Finished difference Result 1332 states and 4167 transitions. [2021-07-09 17:49:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:19,080 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 [2021-07-09 17:49:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:19,082 INFO L225 Difference]: With dead ends: 1332 [2021-07-09 17:49:19,082 INFO L226 Difference]: Without dead ends: 1308 [2021-07-09 17:49:19,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1322.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-09 17:49:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 835. [2021-07-09 17:49:19,093 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) [2021-07-09 17:49:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-09 17:49:19,095 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-09 17:49:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:19,095 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-09 17:49:19,095 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) [2021-07-09 17:49:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-09 17:49:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:19,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:19,096 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:19,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9585,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:19,296 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 515277176, now seen corresponding path program 729 times [2021-07-09 17:49:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270615697] [2021-07-09 17:49:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:19,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270615697] [2021-07-09 17:49:19,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270615697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:19,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190924915] [2021-07-09 17:49:19,417 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 [2021-07-09 17:49:19,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:49:19,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:19,818 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-09 17:49:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:20,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190924915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:20,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:20,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:20,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523464129] [2021-07-09 17:49:20,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:20,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:20,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:20,064 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) [2021-07-09 17:49:20,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-09 17:49:20,627 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2021-07-09 17:49:20,830 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-07-09 17:49:21,024 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-07-09 17:49:21,171 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-07-09 17:49:21,338 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-07-09 17:49:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:21,360 INFO L93 Difference]: Finished difference Result 1285 states and 4068 transitions. [2021-07-09 17:49:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:21,360 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 [2021-07-09 17:49:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:21,362 INFO L225 Difference]: With dead ends: 1285 [2021-07-09 17:49:21,362 INFO L226 Difference]: Without dead ends: 1267 [2021-07-09 17:49:21,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1393.3ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-09 17:49:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 837. [2021-07-09 17:49:21,380 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) [2021-07-09 17:49:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-07-09 17:49:21,382 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-07-09 17:49:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:21,382 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-07-09 17:49:21,382 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) [2021-07-09 17:49:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-07-09 17:49:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:21,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:21,383 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:21,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9605,754 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:21,584 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1961113022, now seen corresponding path program 730 times [2021-07-09 17:49:21,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:21,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792576080] [2021-07-09 17:49:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:21,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792576080] [2021-07-09 17:49:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792576080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807917902] [2021-07-09 17:49:21,729 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 [2021-07-09 17:49:21,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807917902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:22,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:22,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805677226] [2021-07-09 17:49:22,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:22,300 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) [2021-07-09 17:49:22,660 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-09 17:49:22,938 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-09 17:49:23,138 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-09 17:49:23,329 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-07-09 17:49:23,490 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-09 17:49:23,721 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-07-09 17:49:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:23,742 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-07-09 17:49:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:23,742 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 [2021-07-09 17:49:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:23,745 INFO L225 Difference]: With dead ends: 1279 [2021-07-09 17:49:23,745 INFO L226 Difference]: Without dead ends: 1267 [2021-07-09 17:49:23,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1458.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:49:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-09 17:49:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 839. [2021-07-09 17:49:23,756 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) [2021-07-09 17:49:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2771 transitions. [2021-07-09 17:49:23,757 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2771 transitions. Word has length 22 [2021-07-09 17:49:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:23,757 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2771 transitions. [2021-07-09 17:49:23,757 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) [2021-07-09 17:49:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2771 transitions. [2021-07-09 17:49:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:23,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:23,759 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:23,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9623,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:23,959 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1209712584, now seen corresponding path program 731 times [2021-07-09 17:49:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:23,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79935090] [2021-07-09 17:49:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:24,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79935090] [2021-07-09 17:49:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79935090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588900055] [2021-07-09 17:49:24,111 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 [2021-07-09 17:49:24,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:49:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:24,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:24,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:24,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:24,687 INFO L628 ElimStorePlain]: treesize reduction 33, result has 26.7 percent of original size [2021-07-09 17:49:24,687 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:24,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:24,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:12 [2021-07-09 17:49:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:24,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588900055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:24,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:24,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-07-09 17:49:24,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926726500] [2021-07-09 17:49:24,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:24,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:24,735 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) [2021-07-09 17:49:25,069 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-09 17:49:25,276 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-07-09 17:49:25,472 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-07-09 17:49:25,664 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-07-09 17:49:25,848 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-07-09 17:49:26,031 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-07-09 17:49:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:26,149 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-07-09 17:49:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:26,157 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 [2021-07-09 17:49:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:26,159 INFO L225 Difference]: With dead ends: 1279 [2021-07-09 17:49:26,159 INFO L226 Difference]: Without dead ends: 1273 [2021-07-09 17:49:26,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1470.4ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:49:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-07-09 17:49:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 835. [2021-07-09 17:49:26,170 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) [2021-07-09 17:49:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-07-09 17:49:26,171 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-07-09 17:49:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:26,171 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-07-09 17:49:26,171 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) [2021-07-09 17:49:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-07-09 17:49:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:26,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:26,172 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] [2021-07-09 17:49:26,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9646,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:26,373 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash 873218397, now seen corresponding path program 23 times [2021-07-09 17:49:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513859086] [2021-07-09 17:49:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:26,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:26,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513859086] [2021-07-09 17:49:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513859086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:26,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080669885] [2021-07-09 17:49:26,430 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 [2021-07-09 17:49:26,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:49:26,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:49:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080669885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:26,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:26,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:49:26,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951707733] [2021-07-09 17:49:26,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:49:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:49:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:49:26,679 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) [2021-07-09 17:49:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:27,150 INFO L93 Difference]: Finished difference Result 1130 states and 3525 transitions. [2021-07-09 17:49:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:49:27,150 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 [2021-07-09 17:49:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:27,152 INFO L225 Difference]: With dead ends: 1130 [2021-07-09 17:49:27,152 INFO L226 Difference]: Without dead ends: 1120 [2021-07-09 17:49:27,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:49:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-09 17:49:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 863. [2021-07-09 17:49:27,163 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) [2021-07-09 17:49:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2841 transitions. [2021-07-09 17:49:27,164 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2841 transitions. Word has length 22 [2021-07-09 17:49:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:27,164 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2841 transitions. [2021-07-09 17:49:27,164 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) [2021-07-09 17:49:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2841 transitions. [2021-07-09 17:49:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:27,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:27,165 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] [2021-07-09 17:49:27,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9668,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:27,366 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1581576615, now seen corresponding path program 24 times [2021-07-09 17:49:27,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:27,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287420867] [2021-07-09 17:49:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:27,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:27,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287420867] [2021-07-09 17:49:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287420867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408715453] [2021-07-09 17:49:27,422 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 [2021-07-09 17:49:27,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:49:27,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:49:27,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:27,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408715453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:27,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:49:27,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281262637] [2021-07-09 17:49:27,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:49:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:49:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:49:27,697 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) [2021-07-09 17:49:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:28,228 INFO L93 Difference]: Finished difference Result 1129 states and 3521 transitions. [2021-07-09 17:49:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:49:28,228 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 [2021-07-09 17:49:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:28,230 INFO L225 Difference]: With dead ends: 1129 [2021-07-09 17:49:28,230 INFO L226 Difference]: Without dead ends: 1117 [2021-07-09 17:49:28,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:49:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-09 17:49:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 860. [2021-07-09 17:49:28,241 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) [2021-07-09 17:49:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2830 transitions. [2021-07-09 17:49:28,242 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2830 transitions. Word has length 22 [2021-07-09 17:49:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2830 transitions. [2021-07-09 17:49:28,242 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) [2021-07-09 17:49:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2830 transitions. [2021-07-09 17:49:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:28,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:28,243 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:28,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 758 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9676 [2021-07-09 17:49:28,444 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash -525207505, now seen corresponding path program 25 times [2021-07-09 17:49:28,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:28,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910661363] [2021-07-09 17:49:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:28,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:28,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910661363] [2021-07-09 17:49:28,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910661363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:28,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222980112] [2021-07-09 17:49:28,498 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 [2021-07-09 17:49:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:49:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222980112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:28,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:28,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:49:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919653943] [2021-07-09 17:49:28,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:28,758 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) [2021-07-09 17:49:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:29,149 INFO L93 Difference]: Finished difference Result 1106 states and 3473 transitions. [2021-07-09 17:49:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:29,150 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 [2021-07-09 17:49:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:29,151 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 17:49:29,151 INFO L226 Difference]: Without dead ends: 1085 [2021-07-09 17:49:29,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-07-09 17:49:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 857. [2021-07-09 17:49:29,161 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) [2021-07-09 17:49:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2819 transitions. [2021-07-09 17:49:29,163 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2819 transitions. Word has length 22 [2021-07-09 17:49:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:29,163 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2819 transitions. [2021-07-09 17:49:29,163 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) [2021-07-09 17:49:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2819 transitions. [2021-07-09 17:49:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:29,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:29,164 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] [2021-07-09 17:49:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9682 [2021-07-09 17:49:29,365 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1853904925, now seen corresponding path program 26 times [2021-07-09 17:49:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545088788] [2021-07-09 17:49:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:29,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:29,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545088788] [2021-07-09 17:49:29,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545088788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:29,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186852070] [2021-07-09 17:49:29,417 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 [2021-07-09 17:49:29,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:49:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186852070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:29,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:29,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:49:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811537856] [2021-07-09 17:49:29,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:49:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:49:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:29,675 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) [2021-07-09 17:49:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:29,933 INFO L93 Difference]: Finished difference Result 1081 states and 3404 transitions. [2021-07-09 17:49:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:49:29,933 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 [2021-07-09 17:49:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:29,935 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 17:49:29,935 INFO L226 Difference]: Without dead ends: 1041 [2021-07-09 17:49:29,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-09 17:49:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 825. [2021-07-09 17:49:29,944 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) [2021-07-09 17:49:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2742 transitions. [2021-07-09 17:49:29,946 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2742 transitions. Word has length 22 [2021-07-09 17:49:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:29,946 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2742 transitions. [2021-07-09 17:49:29,946 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) [2021-07-09 17:49:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2742 transitions. [2021-07-09 17:49:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:29,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:29,947 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:30,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9686 [2021-07-09 17:49:30,148 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1305500157, now seen corresponding path program 732 times [2021-07-09 17:49:30,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:30,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748840844] [2021-07-09 17:49:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:30,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:30,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748840844] [2021-07-09 17:49:30,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748840844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:30,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282857118] [2021-07-09 17:49:30,226 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 [2021-07-09 17:49:30,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:49:30,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:30,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,488 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 13 treesize of output 9 [2021-07-09 17:49:30,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,492 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 [2021-07-09 17:49:30,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:30,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:30,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:30,522 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-07-09 17:49:30,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:30,522 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-07-09 17:49:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:30,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282857118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:30,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:30,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 17:49:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365320486] [2021-07-09 17:49:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:49:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:49:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:30,570 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) [2021-07-09 17:49:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:30,872 INFO L93 Difference]: Finished difference Result 1202 states and 3846 transitions. [2021-07-09 17:49:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:49:30,872 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 [2021-07-09 17:49:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:30,874 INFO L225 Difference]: With dead ends: 1202 [2021-07-09 17:49:30,874 INFO L226 Difference]: Without dead ends: 1132 [2021-07-09 17:49:30,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-07-09 17:49:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 850. [2021-07-09 17:49:30,884 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) [2021-07-09 17:49:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-07-09 17:49:30,885 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-07-09 17:49:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:30,885 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-07-09 17:49:30,885 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) [2021-07-09 17:49:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-07-09 17:49:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:30,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:30,887 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:31,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9690,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:31,087 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1958577410, now seen corresponding path program 733 times [2021-07-09 17:49:31,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:31,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408133056] [2021-07-09 17:49:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:31,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:31,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408133056] [2021-07-09 17:49:31,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408133056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860595181] [2021-07-09 17:49:31,200 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 [2021-07-09 17:49:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:31,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:31,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:31,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:31,543 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 17:49:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:31,545 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 12 treesize of output 8 [2021-07-09 17:49:31,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:31,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:31,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:31,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:49:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:31,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860595181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:31,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-09 17:49:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585751918] [2021-07-09 17:49:31,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:49:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:49:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:49:31,606 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) [2021-07-09 17:49:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:32,094 INFO L93 Difference]: Finished difference Result 1158 states and 3675 transitions. [2021-07-09 17:49:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:32,095 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 [2021-07-09 17:49:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:32,097 INFO L225 Difference]: With dead ends: 1158 [2021-07-09 17:49:32,097 INFO L226 Difference]: Without dead ends: 1158 [2021-07-09 17:49:32,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-07-09 17:49:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 865. [2021-07-09 17:49:32,107 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) [2021-07-09 17:49:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2875 transitions. [2021-07-09 17:49:32,109 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2875 transitions. Word has length 22 [2021-07-09 17:49:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:32,109 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2875 transitions. [2021-07-09 17:49:32,109 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) [2021-07-09 17:49:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2875 transitions. [2021-07-09 17:49:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:32,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:32,110 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:32,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9707,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:32,310 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -799933880, now seen corresponding path program 734 times [2021-07-09 17:49:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:32,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335652754] [2021-07-09 17:49:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335652754] [2021-07-09 17:49:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335652754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596531961] [2021-07-09 17:49:32,422 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 [2021-07-09 17:49:32,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:32,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:32,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:32,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:32,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:32,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:32,766 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-09 17:49:32,766 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:32,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:32,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:49:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596531961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:32,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:32,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-09 17:49:32,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437344389] [2021-07-09 17:49:32,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:49:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:49:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:49:32,826 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) [2021-07-09 17:49:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:33,338 INFO L93 Difference]: Finished difference Result 1210 states and 3796 transitions. [2021-07-09 17:49:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:33,338 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 [2021-07-09 17:49:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:33,340 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:49:33,340 INFO L226 Difference]: Without dead ends: 1210 [2021-07-09 17:49:33,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-09 17:49:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 868. [2021-07-09 17:49:33,351 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) [2021-07-09 17:49:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2886 transitions. [2021-07-09 17:49:33,353 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2886 transitions. Word has length 22 [2021-07-09 17:49:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:33,353 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2886 transitions. [2021-07-09 17:49:33,353 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) [2021-07-09 17:49:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2886 transitions. [2021-07-09 17:49:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:33,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:33,354 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:33,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9725,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:33,560 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2001125694, now seen corresponding path program 735 times [2021-07-09 17:49:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:33,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161923421] [2021-07-09 17:49:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:33,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161923421] [2021-07-09 17:49:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161923421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024180121] [2021-07-09 17:49:33,716 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 [2021-07-09 17:49:33,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:49:33,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:34,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:34,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:34,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-07-09 17:49:34,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:34,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:34,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:34,066 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-07-09 17:49:34,066 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-07-09 17:49:34,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:34,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-07-09 17:49:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:34,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024180121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:34,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:34,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-07-09 17:49:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325179059] [2021-07-09 17:49:34,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:49:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:49:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:49:34,123 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) [2021-07-09 17:49:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:34,617 INFO L93 Difference]: Finished difference Result 1167 states and 3693 transitions. [2021-07-09 17:49:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:49:34,617 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 [2021-07-09 17:49:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:34,619 INFO L225 Difference]: With dead ends: 1167 [2021-07-09 17:49:34,619 INFO L226 Difference]: Without dead ends: 1161 [2021-07-09 17:49:34,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-09 17:49:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 860. [2021-07-09 17:49:34,629 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) [2021-07-09 17:49:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2862 transitions. [2021-07-09 17:49:34,631 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2862 transitions. Word has length 22 [2021-07-09 17:49:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:34,631 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2862 transitions. [2021-07-09 17:49:34,631 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) [2021-07-09 17:49:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2862 transitions. [2021-07-09 17:49:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:49:34,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:34,632 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:34,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9742 [2021-07-09 17:49:34,833 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 294157708, now seen corresponding path program 736 times [2021-07-09 17:49:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:34,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780751790] [2021-07-09 17:49:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:34,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:34,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780751790] [2021-07-09 17:49:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780751790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:34,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123581524] [2021-07-09 17:49:34,963 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 Received shutdown request... [2021-07-09 17:49:35,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:35,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9759,765 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:35,318 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:49:35,319 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:49:35,322 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:49:35,323 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:49:35 BasicIcfg [2021-07-09 17:49:35,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:49:35,323 INFO L168 Benchmark]: Toolchain (without parser) took 832708.08 ms. Allocated memory was 190.8 MB in the beginning and 596.6 MB in the end (delta: 405.8 MB). Free memory was 170.6 MB in the beginning and 220.3 MB in the end (delta: -49.7 MB). Peak memory consumption was 356.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:49:35,323 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:49:35,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.78 ms. Allocated memory is still 190.8 MB. Free memory was 170.6 MB in the beginning and 169.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:49:35,323 INFO L168 Benchmark]: Boogie Preprocessor took 30.88 ms. Allocated memory is still 190.8 MB. Free memory was 169.1 MB in the beginning and 167.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:49:35,324 INFO L168 Benchmark]: RCFGBuilder took 496.31 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 172.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:49:35,324 INFO L168 Benchmark]: TraceAbstraction took 832151.94 ms. Allocated memory was 190.8 MB in the beginning and 596.6 MB in the end (delta: 405.8 MB). Free memory was 172.3 MB in the beginning and 220.3 MB in the end (delta: -48.0 MB). Peak memory consumption was 357.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:49:35,324 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 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.78 ms. Allocated memory is still 190.8 MB. Free memory was 170.6 MB in the beginning and 169.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.88 ms. Allocated memory is still 190.8 MB. Free memory was 169.1 MB in the beginning and 167.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 496.31 ms. Allocated memory is still 190.8 MB. Free memory was 167.8 MB in the beginning and 172.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 832151.94 ms. Allocated memory was 190.8 MB in the beginning and 596.6 MB in the end (delta: 405.8 MB). Free memory was 172.3 MB in the beginning and 220.3 MB in the end (delta: -48.0 MB). Peak memory consumption was 357.8 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 analyzing trace of length 23 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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: 832050.9ms, OverallIterations: 765, TraceHistogramMax: 3, EmptinessCheckTime: 458.0ms, AutomataDifference: 369607.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39843 SDtfs, 77289 SDslu, 233022 SDs, 0 SdLazy, 274344 SolverSat, 6324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 111665.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27204 GetRequests, 12801 SyntacticMatches, 542 SemanticMatches, 13861 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43989 ImplicationChecksByTransitivity, 364942.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=868occurred in iteration=763, InterpolantAutomatonStates: 8366, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4664.7ms AutomataMinimizationTime, 764 MinimizatonAttempts, 164180 StatesRemovedByMinimization, 763 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4113.9ms SsaConstructionTime, 9103.4ms SatisfiabilityAnalysisTime, 227599.7ms InterpolantComputationTime, 31065 NumberOfCodeBlocks, 31059 NumberOfCodeBlocksAsserted, 2230 NumberOfCheckSat, 29538 ConstructedInterpolants, 788 QuantifiedInterpolants, 285691 SizeOfPredicates, 6838 NumberOfNonLiveVariables, 71254 ConjunctsInSsa, 16299 ConjunctsInUnsatCore, 1527 InterpolantComputations, 3 PerfectInterpolantSequences, 2184/7314 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